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Strategies to achieve high performance piezoelectric nanogenerators EI Scopus SCIE
期刊论文 | 2019 , 55 , 288-304 | Nano Energy
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© 2018 Elsevier Ltd Piezoelectric nanogenerators have attracted much attention in the past decade. In this study, the development of piezoelectric nanogenerators and their progress toward high power generation is discussed. The characteristics and application range of numerous types of piezoelectric nanogenerators are also considered. In addition, several strategies that may improve the performance of piezoelectric nanogenerators are summarized. Here, we compare the open circuit voltages and short circuit currents of various piezoelectric nanogenerators under different factors, and the current problems of piezoelectric nanogenerators are also discussed. Finally, the future prospects and directions of piezoelectric nanogenerators are predicted. Future studies should be focused on the production of high-performance materials, the establishment of working principle and simulation model, the integration of nanogenerator, and the design of the energy harvesting circuit. Hence, it is emergency to search for functional materials with high piezoelectricity and further improve the electromechanical properties of existing piezoelectric materials. Moreover, further research is needed to increase the stability and flexibility of composite materials, to develop wearable and embedded flexible functional devices based on the biocompatibility of inorganic nanoparticles, and to supply power for microelectronic systems.

Keyword :

BaTiO3 Chemical doping Composite thin film materials Nanostructure Piezoelectric nanogenerators PVDF

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GB/T 7714 Hu, Dengwei , Yao, Minggang , Fan, Yong et al. Strategies to achieve high performance piezoelectric nanogenerators [J]. | Nano Energy , 2019 , 55 : 288-304 .
MLA Hu, Dengwei et al. "Strategies to achieve high performance piezoelectric nanogenerators" . | Nano Energy 55 (2019) : 288-304 .
APA Hu, Dengwei , Yao, Minggang , Fan, Yong , Ma, Chunrui , Fan, Mingjin , Liu, Ming . Strategies to achieve high performance piezoelectric nanogenerators . | Nano Energy , 2019 , 55 , 288-304 .
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A "crab-like" A6 relativistic magnetron with diffraction output driven by a transparent cathode SCIE
期刊论文 | 2019 , 26 (1) | PHYSICS OF PLASMAS
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We present the design of an A6 relativistic magnetron with diffraction output (MDO) which looks like a crab and we named it the "crab-like" A6 MDO. This article shows that the crab-like A6 MDO driven by a transparent cathode can radiate the TE11 mode with an output power of about 1 GW when an optimized applied voltage of U = 440 kV and magnetic field of B = 0: 43 T are used. Its electronic efficiency, as obtained using UNIPIC particle-in-cell (PIC) simulations, can be as high as 44% in S-band. The UNIPIC PIC code used in simulations also demonstrates that the crab-like A6 MDO can radiate both two electron spokes in the TE21 mode with an operating frequency of 2.1GHz and four electron spokes in the TE21 mode with an operating frequency of 2.5GHz when different magnetic field amplitudes are used for an applied voltage of U = 400 kV. This result suggests that this configuration is favorable for mode switching. This work seeks to design a compact high power microwave source for a narrowband directed microwave wave beam that is suitable for mode switching investigations. Published under license by AIP Publishing.

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GB/T 7714 Liu, M. , Schamiloglu, E. , Fuks, M. I. et al. A "crab-like" A6 relativistic magnetron with diffraction output driven by a transparent cathode [J]. | PHYSICS OF PLASMAS , 2019 , 26 (1) .
MLA Liu, M. et al. "A "crab-like" A6 relativistic magnetron with diffraction output driven by a transparent cathode" . | PHYSICS OF PLASMAS 26 . 1 (2019) .
APA Liu, M. , Schamiloglu, E. , Fuks, M. I. , Liu, C. , Jiang, W. , Feng, J. . A "crab-like" A6 relativistic magnetron with diffraction output driven by a transparent cathode . | PHYSICS OF PLASMAS , 2019 , 26 (1) .
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Tuning the Magnetic Anisotropy of Fe3O4/Pt Heterostructures Fabricated by Atomic Layer Deposition With In Situ Magnetic Field SCIE
期刊论文 | 2019 , 55 (3) | IEEE TRANSACTIONS ON MAGNETICS
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Research on tuning the magnetic anisotropy of magnetic heterostructures has been receiving intensive attentions due to their intriguing tuning phenomena. In particular, tuning the magnetic anisotropy by in situ magnetic field during the fabrication process allows a remarkable control of magnetism with energy efficiency and shows significant potential applications for compact, fast, and low-power microwave and electronic devices. In this paper, in situ external out-of-plane and in-plane magnetic fields were applied during the deposition of Fe3O4 thin films on Pt substrates by atomic layer deposition at different temperatures (350 degrees C, 400 degrees C, and 450 degrees C). The effects of in situ magnetic field with different directions on the surface morphologies and magnetic properties of Fe3O4/Pt heterostructures were characterized. It was found that both the out-of-plane and in-plane external magnetic fields tuned the magnetic anisotropy of ferromagnetic Fe3O4 when deposited at 400 degrees C with the maximum resonance field changes of 620 and 1930 Oe along in-plane and out-of-plane directions, respectively. This paper achieves tuning the magnetic properties through in situ magnetic field and provides a possibility for spintronic devices.

Keyword :

Fe3O4/Pt heterostructures magnetic anisotropy Atomic layer deposition (ALD) in situ magnetic field

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GB/T 7714 Zhang, Le , Zhou, Ziyao , Zhang, Yijun et al. Tuning the Magnetic Anisotropy of Fe3O4/Pt Heterostructures Fabricated by Atomic Layer Deposition With In Situ Magnetic Field [J]. | IEEE TRANSACTIONS ON MAGNETICS , 2019 , 55 (3) .
MLA Zhang, Le et al. "Tuning the Magnetic Anisotropy of Fe3O4/Pt Heterostructures Fabricated by Atomic Layer Deposition With In Situ Magnetic Field" . | IEEE TRANSACTIONS ON MAGNETICS 55 . 3 (2019) .
APA Zhang, Le , Zhou, Ziyao , Zhang, Yijun , Peng, Bin , Ren, Wei , Ye, Zuo-Guang et al. Tuning the Magnetic Anisotropy of Fe3O4/Pt Heterostructures Fabricated by Atomic Layer Deposition With In Situ Magnetic Field . | IEEE TRANSACTIONS ON MAGNETICS , 2019 , 55 (3) .
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A Highly Thermostable In2O3/ITO Thin Film Thermocouple Prepared via Screen Printing for High Temperature Measurements EI SCIE PubMed Scopus
期刊论文 | 2018 , 18 (4) | SENSORS
WoS CC Cited Count: 4 SCOPUS Cited Count: 6
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Abstract :

An In2O3/ITO thin film thermocouple was prepared via screen printing. Glass additives were added to improve the sintering process and to increase the density of the In2O3/ITO films. The surface and cross-sectional images indicate that both the grain size and densification of the ITO and In2O3 films increased with the increase in annealing time. The thermoelectric voltage of the In2O3/ITO thermocouple was 53.5 mV at 1270 degrees C at the hot junction. The average Seebeck coefficient of the thermocouple was calculated as 44.5 mu V/degrees C. The drift rate of the In2O3/ITO thermocouple was 5.44 degrees C/h at a measuring time of 10 h at 1270 degrees C.

Keyword :

screen printing thermocouple thermoelectric response Seebeck coefficient

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GB/T 7714 Liu, Yantao , Ren, Wei , Shi, Peng et al. A Highly Thermostable In2O3/ITO Thin Film Thermocouple Prepared via Screen Printing for High Temperature Measurements [J]. | SENSORS , 2018 , 18 (4) .
MLA Liu, Yantao et al. "A Highly Thermostable In2O3/ITO Thin Film Thermocouple Prepared via Screen Printing for High Temperature Measurements" . | SENSORS 18 . 4 (2018) .
APA Liu, Yantao , Ren, Wei , Shi, Peng , Liu, Dan , Zhang, Yijun , Liu, Ming et al. A Highly Thermostable In2O3/ITO Thin Film Thermocouple Prepared via Screen Printing for High Temperature Measurements . | SENSORS , 2018 , 18 (4) .
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Ionic Gel Modulation of RKKY Interactions in Synthetic Anti-Ferromagnetic Nanostructures for Low Power Wearable Spintronic Devices EI SCIE PubMed Scopus
期刊论文 | 2018 , 30 (22) | ADVANCED MATERIALS
WoS CC Cited Count: 7 SCOPUS Cited Count: 7
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To meet the demand of developing compatible and energy-efficient flexible spintronics, voltage manipulation of magnetism on soft substrates is in demand. Here, a voltage tunable flexible field-effect transistor structure by ionic gel (IG) gating in perpendicular synthetic anti-ferromagnetic nanostructure is demonstrated. As a result, the interlayer Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction can be tuned electrically at room temperature. With a circuit gating voltage, anti-ferromagnetic (AFM) ordering is enhanced or converted into an AFM-ferromagnetic (FM) intermediate state, accompanying with the dynamic domain switching. This IG gating process can be repeated stably at different curvatures, confirming an excellent mechanical property. The IG-induced modification of interlayer exchange coupling is related to the change of Fermi level aroused by the disturbance of itinerant electrons. The voltage modulation of RKKY interaction with excellent flexibility proposes an application potential for wearable spintronic devices with energy efficiency and ultralow operation voltage.

Keyword :

Ruderman-Kittel-Kasuya-Yosida interactions synthetic anti-ferromagnetic multilayers flexible spintronics ionic gel gating voltage control of magnetism

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GB/T 7714 Yang, Qu , Zhou, Ziyao , Wang, Liqian et al. Ionic Gel Modulation of RKKY Interactions in Synthetic Anti-Ferromagnetic Nanostructures for Low Power Wearable Spintronic Devices [J]. | ADVANCED MATERIALS , 2018 , 30 (22) .
MLA Yang, Qu et al. "Ionic Gel Modulation of RKKY Interactions in Synthetic Anti-Ferromagnetic Nanostructures for Low Power Wearable Spintronic Devices" . | ADVANCED MATERIALS 30 . 22 (2018) .
APA Yang, Qu , Zhou, Ziyao , Wang, Liqian , Zhang, Hongjia , Cheng, Yuxin , Hu, Zhongqiang et al. Ionic Gel Modulation of RKKY Interactions in Synthetic Anti-Ferromagnetic Nanostructures for Low Power Wearable Spintronic Devices . | ADVANCED MATERIALS , 2018 , 30 (22) .
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Thermal Driven Giant Spin Dynamics at Three-Dimensional Heteroepitaxial Interface in Ni0.5Zn0.5Fe2O4/BaTiO3-Pillar Nanocomposites EI SCIE PubMed Scopus
期刊论文 | 2018 , 12 (4) , 3751-3758 | ACS NANO
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Abstract :

Traditional magnetostrictive/piezoelectric laminated composites rely on the two-dimensional interface that transfers stress/strain to achieve the large magnetoelectric (ME) coupling, nevertheless, they suffer from the theoretical limitation of the strain effect and of the substrate clamping effect in real ME applications. In this work, 3D NZFO/BTO-pillar nanocomposite films were grown on SrTiO3 by template-assisted pulsed laser deposition, where BaTiO3 (BTO) nanopillars appeared in an array with distinct phase transitions as the cores were covered by NiZn ferrite (NZFO) layer. The perfect 3D heteroepitaxial interface between BTO and NZFO phases can be identified without any edge dislocations, which allows effective strain transfer at the 3D interface. The 3D structure nanocomposites enable the strong two magnon scattering (TMS) effect that enhances ME coupling at the interface and reduces the clamping effect by strain relaxation. Thereby, a large FMR field shift of 1866 Oe in NZFO/BTO-pillar nanocomposite was obtained at the TMS critical angle near the BTO nanopillars phase transition of 255 K.

Keyword :

3D nanostructure ferromagnetic resonance magnetoelectric coupling multiferroic spinel ferrite

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GB/T 7714 Dong, Guohua , Zhou, Ziyao , Guan, Mengmeng et al. Thermal Driven Giant Spin Dynamics at Three-Dimensional Heteroepitaxial Interface in Ni0.5Zn0.5Fe2O4/BaTiO3-Pillar Nanocomposites [J]. | ACS NANO , 2018 , 12 (4) : 3751-3758 .
MLA Dong, Guohua et al. "Thermal Driven Giant Spin Dynamics at Three-Dimensional Heteroepitaxial Interface in Ni0.5Zn0.5Fe2O4/BaTiO3-Pillar Nanocomposites" . | ACS NANO 12 . 4 (2018) : 3751-3758 .
APA Dong, Guohua , Zhou, Ziyao , Guan, Mengmeng , Xue, Xu , Chen, Mingfeng , Ma, Jing et al. Thermal Driven Giant Spin Dynamics at Three-Dimensional Heteroepitaxial Interface in Ni0.5Zn0.5Fe2O4/BaTiO3-Pillar Nanocomposites . | ACS NANO , 2018 , 12 (4) , 3751-3758 .
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Ionic liquid gating control of RKKY interaction in FeCoB/Ru/FeCoB and (Pt/Co)(2)/Ru/(Co/Pt)(2) multilayers SCIE PubMed Scopus
期刊论文 | 2018 , 9 | NATURE COMMUNICATIONS
WoS CC Cited Count: 14 SCOPUS Cited Count: 13
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To overcome the fundamental challenge of the weak natural response of antiferromagnetic materials under a magnetic field, voltage manipulation of antiferromagnetic interaction is developed to realize ultrafast, high-density, and power efficient antiferromagnetic spintronics. Here, we report a low voltage modulation of Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction via ionic liquid gating in synthetic antiferromagnetic multilayers of FeCoB/Ru/FeCoB and (Pt/Co)(2)/Ru/(Co/Pt)(2). At room temperature, the distinct voltage control of transition between antiferromagnetic and ferromagnetic ordering is realized and up to 80% of perpendicular magnetic moments manage to switch with a small-applied voltage bias of 2.5 V. We related this ionic liquid gating-induced RKKY interaction modification to the disturbance of itinerant electrons inside synthetic antiferromagnetic heterostructure and the corresponding change of its Fermi level. Voltage tuning of RKKY interaction may enable the next generation of switchable spintronics between antiferromagnetic and ferromagnetic modes with both fundamental and practical perspectives.

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GB/T 7714 Yang, Qu , Wang, Lei , Zhou, Ziyao et al. Ionic liquid gating control of RKKY interaction in FeCoB/Ru/FeCoB and (Pt/Co)(2)/Ru/(Co/Pt)(2) multilayers [J]. | NATURE COMMUNICATIONS , 2018 , 9 .
MLA Yang, Qu et al. "Ionic liquid gating control of RKKY interaction in FeCoB/Ru/FeCoB and (Pt/Co)(2)/Ru/(Co/Pt)(2) multilayers" . | NATURE COMMUNICATIONS 9 (2018) .
APA Yang, Qu , Wang, Lei , Zhou, Ziyao , Wang, Liqian , Zhang, Yijun , Zhao, Shishun et al. Ionic liquid gating control of RKKY interaction in FeCoB/Ru/FeCoB and (Pt/Co)(2)/Ru/(Co/Pt)(2) multilayers . | NATURE COMMUNICATIONS , 2018 , 9 .
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Low-Voltage Control of (Co/Pt)(X) Perpendicular Magnetic Anisotropy Heterostructure for Flexible Spintronics EI SCIE PubMed Scopus
期刊论文 | 2018 , 12 (7) , 7167-7173 | ACS NANO
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The trend of mobile Internet requires portable and wearable devices as bio-device interfaces. Electric field control of magnetism is a promising approach to achieve compact, light-weight, and energy-efficient wearable devices. Within a flexible sandwich heterostructure, perpendicular magnetic anisotropy switching was achieved via low-voltage gating control of an ionic gel in mica/Ta/(Pt/Co)(x)/Pt/ionic gel/Pt, where (Pt/Co)(x) acted as a functional layer. By conducting in situ VSM, EPR, and MOKE measurements, a 1098 Oe magnetic anisotropy field change was determined at the bending state with tensile strain, corresponding to a magnetic anisotropy energy change of 3.16 x 10(5) J/m(3) and a giant voltage tunability coefficient of 0.79 X 10(5) J/m(3).V. The low voltage and strain dual control of magnetism on mica substrates enables tunable flexible spintronic devices with an increased degree of manipulation.

Keyword :

ferromagnetic resonance flexible magnetoelectric devices perpendicular magnetic anisotropy ionic gel gating voltage control of magnetism

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GB/T 7714 Zhao, Shishun , Zhou, Ziyao , Li, Chunlei et al. Low-Voltage Control of (Co/Pt)(X) Perpendicular Magnetic Anisotropy Heterostructure for Flexible Spintronics [J]. | ACS NANO , 2018 , 12 (7) : 7167-7173 .
MLA Zhao, Shishun et al. "Low-Voltage Control of (Co/Pt)(X) Perpendicular Magnetic Anisotropy Heterostructure for Flexible Spintronics" . | ACS NANO 12 . 7 (2018) : 7167-7173 .
APA Zhao, Shishun , Zhou, Ziyao , Li, Chunlei , Peng, Bin , Hu, Zhongqiang , Liu, Ming . Low-Voltage Control of (Co/Pt)(X) Perpendicular Magnetic Anisotropy Heterostructure for Flexible Spintronics . | ACS NANO , 2018 , 12 (7) , 7167-7173 .
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Achieving Higher Strength and Sensitivity toward UV Light in Multifunctional Composites by Controlling the Thickness of Nanolayer on the Surface of Glass Fiber EI SCIE PubMed Scopus
期刊论文 | 2018 , 10 (27) , 23399-23405 | ACS APPLIED MATERIALS & INTERFACES
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The interphase between fiber and matrix plays an essential role in the performance of composites. Therefore, the ability to design or modify the interphase is a key technology needed to manufacture stronger and smarter composite. Recently, depositing nanomaterials onto the surface of the fiber has become a promising approach to optimize the interphase and composites. But, the modified composites have not reached the highest strength yet, because the determining parameters, such as thickness of the nanolayer, are hardly controlled by the mentioned methods in reported works. Here, we deposit conformal ZnO nanolayer with various thicknesses onto the surfaces of glass fibers via the atomic layer deposition (ALD) method and a tremendous enhancement of interfacial shear strength of composites is achieved. Importantly, a critical thickness of ZnO nanolayer is obtained for the first time, giving rise to a maximal relative enhancement in the interfacial strength, which is more than 200% of the control fiber. In addition, the single modified fiber exhibits a potential application as a flexible, transparent, in situ UV detector in composites. And, we find the UV-sensitivity also shows a strong correlation with the thickness of ZnO. To reveal the dependence of UV-sensitivity on thickness, a depletion thickness is estimated by a proposed model which is an essential guide to design the detectors with higher sensitivity. Consequently, such precise tailoring of the interphase offers an advanced way to improve and to flexibly control various macroscopic properties of multifunctional composites of the next generation.

Keyword :

interfacial strength UV detector atomic layer deposition multifunctional composites ZnO nanolayer

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GB/T 7714 Sun, Chao , Zhang, Jie , Gao, Shang-Lin et al. Achieving Higher Strength and Sensitivity toward UV Light in Multifunctional Composites by Controlling the Thickness of Nanolayer on the Surface of Glass Fiber [J]. | ACS APPLIED MATERIALS & INTERFACES , 2018 , 10 (27) : 23399-23405 .
MLA Sun, Chao et al. "Achieving Higher Strength and Sensitivity toward UV Light in Multifunctional Composites by Controlling the Thickness of Nanolayer on the Surface of Glass Fiber" . | ACS APPLIED MATERIALS & INTERFACES 10 . 27 (2018) : 23399-23405 .
APA Sun, Chao , Zhang, Jie , Gao, Shang-Lin , Zhang, Nan , Zhang, Yi-Jun , Zhuang, Jian et al. Achieving Higher Strength and Sensitivity toward UV Light in Multifunctional Composites by Controlling the Thickness of Nanolayer on the Surface of Glass Fiber . | ACS APPLIED MATERIALS & INTERFACES , 2018 , 10 (27) , 23399-23405 .
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Ionic Liquid Gating Control of Spin Reorientation Transition and Switching of Perpendicular Magnetic Anisotropy EI SCIE PubMed Scopus
期刊论文 | 2018 , 30 (30) | ADVANCED MATERIALS
WoS CC Cited Count: 5 SCOPUS Cited Count: 3
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Electric field (E-field) modulation of perpendicular magnetic anisotropy (PMA) switching, in an energy-efficient manner, is of great potential to realize magnetoelectric (ME) memories and other ME devices. Voltage control of the spin-reorientation transition (SRT) that allows the magnetic moment rotating between the out-of-plane and the in-plane direction is thereby crucial. In this work, a remarkable magnetic anisotropy field change up to 1572 Oe is achieved under a small operation voltage of 4 V through ionic liquid (IL) gating control of SRT in Au/[DEME](+)[TFSI](-)/Pt/(Co/Pt)(2)/Ta capacitor heterostructures at room temperature, corresponding to a large ME coefficient of 378 Oe V-1. As revealed by both ferromagnetic resonance measurements and magnetic domain evolution observation, the magnetization can be switched stably and reversibly between the out-of-plane and in-plane directions via IL gating. The key mechanism, revealed by the first-principles calculation, is that the IL gating process influences the interfacial spin-orbital coupling as well as net Rashba magnetic field between the Co and Pt layers, resulting in the modulation of the SRT and in-plane/out-of-plane magnetization switching. This work demonstrates a unique IL-gated PMA with large ME tunability and paves a way toward IL gating spintronic/electronic devices such as voltage tunable PMA memories.

Keyword :

ferromagnetic resonance ionic liquid gating perpendicular magnetic anisotropy spin-reorientation transition voltage control of magnetism

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GB/T 7714 Zhao, Shishun , Wang, Lei , Zhou, Ziyao et al. Ionic Liquid Gating Control of Spin Reorientation Transition and Switching of Perpendicular Magnetic Anisotropy [J]. | ADVANCED MATERIALS , 2018 , 30 (30) .
MLA Zhao, Shishun et al. "Ionic Liquid Gating Control of Spin Reorientation Transition and Switching of Perpendicular Magnetic Anisotropy" . | ADVANCED MATERIALS 30 . 30 (2018) .
APA Zhao, Shishun , Wang, Lei , Zhou, Ziyao , Li, Chunlei , Dong, Guohua , Zhang, Le et al. Ionic Liquid Gating Control of Spin Reorientation Transition and Switching of Perpendicular Magnetic Anisotropy . | ADVANCED MATERIALS , 2018 , 30 (30) .
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