High performance magnetostriction of Fe-Cu-Pd ferromagnetic strain glass:Local chemical ordering induced martensitic nanodomains morphology with low modulus - Details

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Abstract：

Large　magnetostriction　with　low　saturation　magnetic　field　was　recently　reported　in　Fe-Pd　ferromagnetic　strain　glass　alloys.　Such　behaviour　is　highly　desirable　for　miniaturized　sensor　and　actuator　applications.　The　origin　of　high　performance　magnetostriction　in　Fe-Pd　ferromagnetic　strain　glass　is　suggested　to　stem　from　its　martensitic　nanodomains.　However,　the　atomic　formation　mechanism　underlying　these　nanodomains　and　their　associated　local　crystal　symmetry　breaking　have　not　been　well　revealed.　Moreover,　accumulating　experimental　results　indicate　that　the　nano-structure　can　lead　to　a　small　saturation　field　but　cannot　guarantee　large　magnetostriction.　Consequently,　the　necessary　conditions　for　low　field　triggered　large　magnetostriction　of　Fe-Pd　ferromagnetic　strain　glass　alloys　still　remain　unclear.　In　this　paper,　the　chemistry,　structure　and　transformation　properties　of　the　Fe98-xCu2Pdx　(x　=　28.5　∼　31)　system　are　systematically　explored　to　discover　the　origin　of　the　high　performance　magnetostriction　of　ferromagnetic　strain　glass　alloys.　We　found　that　the　structure　of　ferromagnetic　strain　glass　consists　of　local　chemical　order.　This　leads　to　tetragonal　martensitic　nanodomains　with　the　local　crystal　symmetry　breaking.　The　local　chemical　order　also　induces　strong　local　phonon　softening　and　a　low　modulus　during　the　strain　glass　transition.　Further　investigation　shows　that　the　combination　of　martensitic　nanodomains　and　low　modulus　are　the　necessary　conditions　to　achieve　both　large　magnetostriction　and　a　low　saturation　field,　because　they　can　result　in　small　energy　barriers　for　the　rotation　of　nanodomains.　These　findings　provide　an　effective　guideline　to　design　high　performance　magnetostrictive　materials　and　devices.　©　2022　Acta　Materialia　Inc.

Keyword：

Binary alloys Copper alloys Crystal symmetry Elastic moduli Ferromagnetic materials Ferromagnetism Glass Glass transition Iron alloys Magnetostriction Magnetostrictive devices Morphology Nanostructures Palladium alloys Ternary alloys

Author Community：

[ 1 ] [Hao, Chunxi]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China
[ 2 ] [Hao, Chunxi]College of Science, Northwest Agriculture and Forestry University, Yangling; 712100, China
[ 3 ] [Wang, Yu]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China
[ 4 ] [Lu, Teng]Research School of Chemistry, The Australian National University, Science Road, Canberra; ACT; 0201, Australia
[ 5 ] [Kremer, Felipe]Centre for Advanced Microscopy, The Australian National University, Canberra; ACT; 2601, Australia
[ 6 ] [Withers, Ray]Research School of Chemistry, The Australian National University, Science Road, Canberra; ACT; 0201, Australia
[ 7 ] [Liu, Chang]Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an; 710049, China
[ 8 ] [Zheng, Aqun]School of Chemistry, Xi'an Jiaotong University, Xi'an; 710049, China
[ 9 ] [Yang, Sen]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China
[ 10 ] [Song, Xiaoping]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China
[ 11 ] [Ren, Xiaobing]Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an; 710049, China
[ 12 ] [Liu, Yun]Research School of Chemistry, The Australian National University, Science Road, Canberra; ACT; 0201, Australia

Reprint Author's Address：

Y. Wang;;MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials, School of Physics, Xi'an Jiaotong University, Xi'an, 710049, China;;email: yuwang@mail.xjtu.edu.cn;;

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