首页|Relationship among intrinsic magnetic parameters and structure and crucial effect of metastable Fe3B phase in Fe-metalloid amorphous alloys

Relationship among intrinsic magnetic parameters and structure and crucial effect of metastable Fe3B phase in Fe-metalloid amorphous alloys

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The intrinsic heterogeneity of an amorphous structure originates from composition,and the structure de-termines the magnetic properties and crystallization models of amorphous magnets.Based on classical Fe-B binary magnetic amorphous alloys,the relationship between the structure and magnetic properties was extensively studied.The stacking structure of Fe-B binary amorphous alloys exhibit discontinuous changes within the range of 74-87 at.％Fe.The structural feature can be expressed as Amor.Fe3B ma-trix+Fe atoms are transforming into Amor.Fe matrix+B atoms with the increase of Fe content.The so-lute atoms are uniformly distributed in the amorphous matrix holes,similar to a single-phase solid solu-tion structure.The transition point corresponds to the eutectic crystallization model composition(Fe82B18 to Fe83B17).A high Fe content will amplify magnetic moment sensitivity to temperature.Under a given service temperature,the disturbance effect of magnetic moment self-spinning will offset the beneficial effect of increasing Fe content and induce the saturation magnetization(Ms)value to decrease.Binary amorphous Fe-B alloys obtain the maximum Curie temperature near 75 at.％Fe,which is slightly smaller than that of the corresponding metastable Fe3B phase,i.e.,the amorphous short-range order structure maintains the highest similarity to the Fe3B phase.The chemical short-range ordering(SRO)structure of amorphous alloys exhibits heredity to corresponding(meta)stable crystal phases.The unique spatial orientation structure of the metastable Fe3B phase is the structural origin of the amorphous nature.This study can guide the composition design of Fe-metalloid magnetic amorphous alloys.The design of ma-terials with excellent magnetic properties originates from a deep understanding of precise composition control and temperature disturbance mechanism.

Fe-metalloid amorphous alloysMagnetization-temperature curveAtomic volumeBloch's lawCrystallization model

Yuanfei Cai、Bo Lin、Yaocen Wang、Rie Umetsu、Dandan Liang、Shoujiang Qu、Yan Zhang、Junqiang Wang、Jun Shen

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School of Materials Science and Engineering,Tongji University,Shanghai 201804,China

Shanghai Key Lab.of D&A for Metal-Functional Materials,School of Materials Science & Engineering,Tongji University,Shanghai 201804,China

CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China

School of Physical Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China

Institute for Material Research,Tohoku University,Sendai 980-8577,Japan

Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment,Shanghai Institute of Technology,Shanghai 201418,China

School of Materials Science and Engineering,Fujian University of Technology,Fuzhou 350118,China

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国家自然科学基金国家自然科学基金"Pioneer and Leading Goose"Research and Development Program of ZhejiangTohoku University

52071217519711792022C01023202303-CRKKE-0504

2024

10.1016/j.jmst.2023.07.079

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.180(13)
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