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学者姓名:宋晓平

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< Page ,Total 44 >
Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy EI SCIE
期刊论文 | 2021 , 886 | JOURNAL OF ALLOYS AND COMPOUNDS
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Abstract :

Magnetization reversal has attracted more and more interests due to its applications on spintronic devise and magnetic storage materials. However, the magnetization reversal is rarely studied in the non-rare earth intermetallic compounds. In this work, we have found that the Ni20Mn3B6 alloy exhibits the magnetization reversal phenomenon with the decreasing temperature at low applied fields (H <= 100 Oe), accompanying with two compensation temperatures. Further analysis showed that the first compensation temperatures is due to the competition between the two different interactions of Mn atoms that occupy two different positions. The second one is arising from the rotating of the moment on demand of Zeeman energy. Based on this phenomenon, a tunable bipolar switching of magnetization between positive and negative value has been found in the alloy between two compensation temperatures, which can be applied in the spintronic devices and magnetic storage materials. (C) 2021 Elsevier B.V. All rights reserved.

Keyword :

Magnetic properties Magnetization reversal Magnetization switching NiMnB alloys

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GB/T 7714 Zhao, Qizhong , Tian, Fanghua , Chang, Tieyan et al. Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 886 .
MLA Zhao, Qizhong et al. "Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy" . | JOURNAL OF ALLOYS AND COMPOUNDS 886 (2021) .
APA Zhao, Qizhong , Tian, Fanghua , Chang, Tieyan , Cao, Kaiyan , Wang, Dingchen , Zhang, Yin et al. Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 886 .
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Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries EI SCIE
期刊论文 | 2021 , 867 | JOURNAL OF ALLOYS AND COMPOUNDS
WoS CC Cited Count: 6
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Abstract :

SnO2 is one of the classic high-capacity anode candidates for lithium-ion batteries (LIBs). However, its practical application is limited by its low electrical conductivity and inferior cycling performance, where the poor cycle performance is mainly caused by large volume changes during the charging/discharging process. In this work, unique thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped poly-pyrrole (T-PVP/SnO2@D-PPy) nanocables have been prepared by a combination of electrospinning and chemical synthesis. The T-PVP/SnO2@D-PPy nanocables have a wrapped nanoarchitecture providing a strong synergistic effect, which results in high conductivity and small volume changes during the charging/discharging processes. The T-PVP/SnO2@D-PPy nanocables could deliver a high reversible capacity of 858.2 mAh g(-1) after 200 cycles at a current density of 100 mA g(-1), indicating the outstanding electrochemical performance. This work provides an elegant method to improve the electrochemical performance of SnO2-based anodes for next-generation lithium-ion batteries and energy storage systems. (C) 2021 Elsevier B.V. All rights reserved.

Keyword :

Lithium-ion battery Nanocables Polypyrrole Polyvinylpyrrolidone SnO2

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GB/T 7714 Tian, Fanghua , Zhang, Yanjun , Liu, Li et al. Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 867 .
MLA Tian, Fanghua et al. "Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries" . | JOURNAL OF ALLOYS AND COMPOUNDS 867 (2021) .
APA Tian, Fanghua , Zhang, Yanjun , Liu, Li , Shi, Qian , Li, Jianing , Zhao, Qizhong et al. Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 867 .
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Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers EI SCIE PubMed
期刊论文 | 2021 , 23 (8) , 4805-4810 | Physical Chemistry Chemical Physics
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Abstract :

A giant exchange bias (EB) of 9600 Oe was observed in polycrystalline Fe3O4/CoO layers at 10 K after 20 kOe field cooling, and was attributed to the strong exchange coupling formed by the interfacial spins between the polycrystalline Fe3O4and the CoO layer. It was found that at 10 K, the magnetic-moment difference (ΔM) between the zero field cooling curves and field cooling curves first increases and then decreases with the change of the field, and it reaches the maximum value at a field of 20 kOe, which suggests that the interfacial spins can be tuned by the cooling field. Furthermore, other magnetic properties, including field dependence, temperature dependence, and training effects, were investigated, which further confirmed that the interfacial spins play an important role in the EB effect. This work provides a method to tune the magnitude of the EB effect and reveals the mechanism of the dependency of EB on interfacial spins, which could guide the design of giant-EB-effect materials. © the Owner Societies 2021.

Keyword :

Cobalt compounds Cooling Iron oxides Magnetic field effects Magnetic moments Magnetite Phase diagrams Temperature distribution

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GB/T 7714 Tian, Fanghua , Li, Yebei , Zhao, Qizhong et al. Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers [J]. | Physical Chemistry Chemical Physics , 2021 , 23 (8) : 4805-4810 .
MLA Tian, Fanghua et al. "Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers" . | Physical Chemistry Chemical Physics 23 . 8 (2021) : 4805-4810 .
APA Tian, Fanghua , Li, Yebei , Zhao, Qizhong , Cao, Kaiyan , Wang, Dingchen , Dai, Zhiyong et al. Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers . | Physical Chemistry Chemical Physics , 2021 , 23 (8) , 4805-4810 .
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Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys EI SCIE
期刊论文 | 2021 , 14 (10) | APPLIED PHYSICS EXPRESS
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Abstract :

An interesting evolution of spin glass behaviors and the corresponding exchange bias effects were observed by quenching Ni50Mn42In3Sb5 Heusler alloys at different temperatures. When the alloy is quenched at 1173 K, it will freeze from antiferromagnetic to spin glass at low temperature under an external magnetic field, creating a giant exchange bias field up to 9063 Oe through the pinning effect. In another case, the superparamagnetic in alloys quenched at 473 K will transform to superspin glass after zero-field cooling at low temperatures instead. As a result, a spontaneous exchange bias effect up to 581 Oe can be achieved.

Keyword :

exchange bias Heusler alloys spin glass superparamagnetic thermal treatment

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GB/T 7714 Cao, Kaiyan , Tian, Fanghua , Huang, Shuo et al. Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys [J]. | APPLIED PHYSICS EXPRESS , 2021 , 14 (10) .
MLA Cao, Kaiyan et al. "Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys" . | APPLIED PHYSICS EXPRESS 14 . 10 (2021) .
APA Cao, Kaiyan , Tian, Fanghua , Huang, Shuo , Zhang, Yin , Zhao, Qizhong , Yao, Kangkang et al. Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys . | APPLIED PHYSICS EXPRESS , 2021 , 14 (10) .
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SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries EI SCIE
期刊论文 | 2021 , 284 | Materials Letters
WoS CC Cited Count: 1
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Abstract :

SnO2@Carbon (SnO2@C) nanowires were prepared using the method electrospinning. After the heat treatment of the SnCl2/polyvinypyrrolidone nanofibers, SnO2 nanoparticles (~20 nm) were uniformly embedded and distributed on the surface of carbon nanowires. The SnO2@C manifested a strong synergistic effect that originated from its wrapped nanoarchitecture, which was proved to be highly conductive with small volume change. This SnO2@C nanowires shown high reversible capacity and excellent cycling performance of 680 mAh g−1 at 100 mA g−1 after 50 cycles. © 2020 Elsevier B.V.

Keyword :

Chlorine compounds Heat treatment Lithium-ion batteries Nanowires

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GB/T 7714 Tian, Fanghua , Cheng, Yangqin , Zhang, Yanjun et al. SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries [J]. | Materials Letters , 2021 , 284 .
MLA Tian, Fanghua et al. "SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries" . | Materials Letters 284 (2021) .
APA Tian, Fanghua , Cheng, Yangqin , Zhang, Yanjun , Zhao, Qizhong , Shi, Qian , Zhang, Yin et al. SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries . | Materials Letters , 2021 , 284 .
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Fatigue behaviors of physical hydrogels based on hydrogen bonds EI SCIE
期刊论文 | 2021 , 46 | EXTREME MECHANICS LETTERS
WoS CC Cited Count: 3
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Abstract :

Physical hydrogels, composed of non-covalently crosslinking three dimensional polymer networks and a large amount of water, have drawn much attention due to their excellent mechanical properties such as high toughness, self-healing, self-recovery, and shape-memory. But the fatigue behaviors of physical hydrogels, especially the role of non-covalent bonds in the fatigue process, have not been well studied. Here we study fatigue damage and fatigue fracture of two kinds of physical hydrogels based on hydrogen bonding (H-bonding): poly(vinyl alcohol)/poly(acrylic acid) (PVA/PAA) gels with weak H-bonding (weak gels) and PVA/PAA-LiCl gels with strong H-bonding (strong gels). For the fatigue damage of uncut samples, both the weak and strong gels are fatigue strengthened in small deformation by stretch-induced H-bonding rearrangement, but are fatigue damaged in large deformation by chain sliding. For the fatigue fracture of precut samples, both the weak and strong gels show no measurable fatigue threshold, but the strong gel can mitigate crack growth. These results reveal the intrinsically weak non-covalent bonds cannot effectively increase the fatigue resistance of physical hydrogels. This work provides a deep perspective for developing novel anti-fatigue hydrogels. (C) 2021 Elsevier Ltd. All rights reserved.

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GB/T 7714 Zhao, Xueqi , Wu, Jingping , Zhou, Yifan et al. Fatigue behaviors of physical hydrogels based on hydrogen bonds [J]. | EXTREME MECHANICS LETTERS , 2021 , 46 .
MLA Zhao, Xueqi et al. "Fatigue behaviors of physical hydrogels based on hydrogen bonds" . | EXTREME MECHANICS LETTERS 46 (2021) .
APA Zhao, Xueqi , Wu, Jingping , Zhou, Yifan , Pan, Yudong , Lu, Tongqing , Song, Xiaoping et al. Fatigue behaviors of physical hydrogels based on hydrogen bonds . | EXTREME MECHANICS LETTERS , 2021 , 46 .
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Novel Mo-doped nickel sulfide thin sheets decorated with Ni-Co layered double hydroxide sheets as an advanced electrode for aqueous asymmetric super-capacitor battery EI SCIE
期刊论文 | 2021 , 509 | JOURNAL OF POWER SOURCES
WoS CC Cited Count: 13
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Abstract :

Rational design and fabrication of composite electrode materials via heteroatom doping and integrating with other components are of significance to improve their energy storage capacity. Herein, the Mo- introduced nickel sulfide thin sheets decorated with Ni-Co Layered Double Hydroxide sheets (Mo-NiS2@NiCo-LDH) grown directly on Ni foam were successfully constructed thought multistep hydrothermal method. The well-designed 2D/2D coupling structure, with interconnected thin sheets, can provide abundant uniform mesoporous structure to facilitate the electrolyte penetration and more redox active sites during energy storage process. The resulting Mo-NiS2 electrode possesses a high capacity of 207.9 mAh g(-1) (1663.2 F g(-1)) at 1 A g(-1). After integrating with NiCo-LDH, the Mo-NiS2@NiCo-LDH electrode exhibits a high capacity of 325.6 mAh g(-1) (2604.8 F g(-1)) at 1 A g(-1). Furthermore, the assembled asymmetric supercapacitor (Mo-NiS2@NiCo-LDH//AC) achieving high energy density of 38.1 W h kg-1 at a power density of 800.0 W kg-1, showing excellent cycling performance. And the fabricated aqueous Ni-Zn battery (Mo-NiS2@NiCo-LDH//Zn) shows a high capacity of 274.9 mAh g(-1) at 1 A g-1 and exhibits a reversible capacity of 182.3 mAh g-1 after 700 cycles at 4 A g(-1). The excellent electrochemical performance of Mo-NiS2@NiCo-LDH arises from the synergistic contributions from Mo-introduced nickel sulfide thin sheets and Ni-Co Layered Double Hydroxide nanosheets.

Keyword :

Aqueous asymmetric super-capacitor battery Electrode Hydroxide Mo-doped nickel sulfide Ni-Co layered double Thin sheets microstructure

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GB/T 7714 Shi, Mangmang , Zhao, Mingshu , Jiao, Lidong et al. Novel Mo-doped nickel sulfide thin sheets decorated with Ni-Co layered double hydroxide sheets as an advanced electrode for aqueous asymmetric super-capacitor battery [J]. | JOURNAL OF POWER SOURCES , 2021 , 509 .
MLA Shi, Mangmang et al. "Novel Mo-doped nickel sulfide thin sheets decorated with Ni-Co layered double hydroxide sheets as an advanced electrode for aqueous asymmetric super-capacitor battery" . | JOURNAL OF POWER SOURCES 509 (2021) .
APA Shi, Mangmang , Zhao, Mingshu , Jiao, Lidong , Su, Zhou , Li, Min , Song, Xiaoping . Novel Mo-doped nickel sulfide thin sheets decorated with Ni-Co layered double hydroxide sheets as an advanced electrode for aqueous asymmetric super-capacitor battery . | JOURNAL OF POWER SOURCES , 2021 , 509 .
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Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries EI SCIE
期刊论文 | 2021 , 35 (5) , 4570-4576 | ENERGY & FUELS
WoS CC Cited Count: 3
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Abstract :

Aqueous rechargeable lithium-ion batteries (ARLBs) are considered to be promising alternatives to traditional Li+-ion batteries. Since the advent of the development of ARLB technology, vanadium oxide has been widely used as an anode material because of its great potential. However, several key flaws require urgent attention, for example, low-rate performance and meager cyclic stability. In this paper, a strategy is proposed to augment the interlayer spacing of the vanadium-oxide structure to boost its electrochemical performance. This work aims at exploiting vanadium oxide by modifying its interlayer spacing by introducing a NH4+ molecule to achieve the pillar effect and the as-prepared NH4V4O10, which exhibits a higher interlayer spacing of 9.8 angstrom. The increased interlayer spacing allows more Li+ to accommodate in the host material and to facilitate their migration. The NH4V4O10 coupled with a commercial LiMn2O4 cathode is able to deliver a capacity of 61.5 mAhg(-1) at a current density of 3 Ag-1 in saturated aqueous LiNO3 electrolyte. The decent cyclic capacity retention of 69.5% is attained for NHVO//LiNO3//LiMn2O4 following 300 cycles of deep charge-discharge at 3 Ag-1. On the basis of the communal findings, the incorporation of NH4+ molecules into the interlayer spacing offers great promise as a high-performance anode for ARLBs.

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GB/T 7714 Lashari, Najeeb Ur Rehman , Zhao, Mingshu , Zheng, Qingyang et al. Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries [J]. | ENERGY & FUELS , 2021 , 35 (5) : 4570-4576 .
MLA Lashari, Najeeb Ur Rehman et al. "Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries" . | ENERGY & FUELS 35 . 5 (2021) : 4570-4576 .
APA Lashari, Najeeb Ur Rehman , Zhao, Mingshu , Zheng, Qingyang , He, Xinhai , Ahmed, Irfan , Su, Zhou et al. Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries . | ENERGY & FUELS , 2021 , 35 (5) , 4570-4576 .
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Kinetic arrest behavior in Ni-Co-Mn-Sn alloys within the phase boundary between martensite and strain glass EI SCIE
期刊论文 | 2021 , 194 | Scripta Materialia
WoS CC Cited Count: 3
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Kinetic arrest behavior is an interesting phenomenon that magnetic martensitic transition is suppressed during field cooling. A metastable 'austenite' is arrested at very low temperatures upon withdrawing magnetic field after field cooling. However, why such a kinetically arrested 'austenite' only appears in limited compositions has not been interpreted so far in ferromagnetic shape memory alloys. To settle this issue, the phase transforming properties and phase diagram of Ni37Co11Mn52-xSnx (x=8.5~10) system are explored. We found that kinetically arrested 'austenite' is a special frozen strain glass state, which only appears within the martensite/strain glass phase boundary composition undergoing two-step transitions, i.e., austenite to strain glass and to martensite transition sequences. The appearance of kinetic arrest behavior is due to the comparative competition between the kinetic hindrance and martensitic driving force. The comprehensive understanding of the kinetic transforming properties of these ferromagnetic shape memory alloys is beneficial for tuning their functionalities. © 2020

Keyword :

Austenite Cobalt alloys Ferromagnetic materials Ferromagnetism Glass Glass transition Kinetics Manganese alloys Martensite Nickel alloys Shape-memory alloy Tin alloys

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GB/T 7714 Hao, Chunxi , Wang, Yu , Wang, Jiaotong et al. Kinetic arrest behavior in Ni-Co-Mn-Sn alloys within the phase boundary between martensite and strain glass [J]. | Scripta Materialia , 2021 , 194 .
MLA Hao, Chunxi et al. "Kinetic arrest behavior in Ni-Co-Mn-Sn alloys within the phase boundary between martensite and strain glass" . | Scripta Materialia 194 (2021) .
APA Hao, Chunxi , Wang, Yu , Wang, Jiaotong , Liang, Chuanxin , Duan, Dong , Wang, Dong et al. Kinetic arrest behavior in Ni-Co-Mn-Sn alloys within the phase boundary between martensite and strain glass . | Scripta Materialia , 2021 , 194 .
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Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage EI SCIE
期刊论文 | 2021 , 861 | JOURNAL OF ALLOYS AND COMPOUNDS
WoS CC Cited Count: 2
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1T-MoS2 is currently under intensive research, because it is a thermodynamically metastable metallic phase with a super electronic conductivity. However, the instability and finite specific capability of 1T-MoS2 hinder its application in batteries. Herein, 1T-MoS2 grown on hollow carbon fiber backbones and coated by a layer of carbon through N-S bond is synthesized by a simple hydrothermal method. N-S bond on the carbon expands the interplanar spacing of 1T-MoS2, which can accommodate more Li+ and improve electronic conductivity. Besides, the carbon coating of 1T-MoS2 grown on hollow carbon fiber backbones is a strong chemical coupling between 1T-MoS2 and the outer carbon matrix by N-S bond, providing a good stable structure on cycling. As a anode material for lithium-ion batteries, the obtained C@MoS2@C nanotubes showed a super capacity (737 mAh g(-1)) at high current density (2 A g(-1)) with long-life cycling (1200 cycles). (C) 2020 Elsevier B.V. All rights reserved.

Keyword :

Chemical coupling C@MoS2@C nanotubes Lithium ion batteries N-S bond Structural stability

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GB/T 7714 Zong, Jingui , Wang, Fei , Zhao, Jiangping et al. Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 861 .
MLA Zong, Jingui et al. "Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage" . | JOURNAL OF ALLOYS AND COMPOUNDS 861 (2021) .
APA Zong, Jingui , Wang, Fei , Zhao, Jiangping , Fan, Xing , Zhao, Mingshu , Yang, Sen et al. Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 861 .
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