首页|Tailoring-compensated ferrimagnetic state and anomalous Hall effect in quaternary Mn-Ru-V-Ga Heusler compounds

Tailoring-compensated ferrimagnetic state and anomalous Hall effect in quaternary Mn-Ru-V-Ga Heusler compounds

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Cubic Mn2RuxGa Heusler compound is a typical example of compensated ferrimagnet with attractive potential for high-density,ultrafast,and low-power spintronic applications.In the form of epitaxial thin films,Mn2RuxGa exhibits high spin polarization and high tunability of compensation temperature by freely changing the Ru content x in a broad range(0.3＜x＜1.0).Herein Mn-Ru-Ga-based polycrystalline bulk buttons prepared by arc melting are systematically studied and it is found that in equilibrium bulk form,the cubic structure is unstable when x＜0.75.To overcome this limitation,Mn-Ru-Ga is alloyed with a fourth element V.By adjusting the content of V in the Mn2Ru0.75VyGa and Mn2.25-yRu0.75VyGa quaternary systems,the magnetic compensation temperature is tuned.Compensation is achieved near 300 K which is confirmed by both the magnetic measurement and anomalous Hall effect measurement.The analyses of the anomalous Hall effect scaling in quaternary Mn-Ru-V-Ga alloy reveal the dominant role of skew scattering,notably that contributed caused by the thermally excited phonons,in contrast to the dominant intrinsic mechanism found in many other 3d ferromagnets and Heusler compounds.It is further shown that the Ga antisites and V content can simultaneously control the residual resistivity ratio(RRR)as well as the relative contribution of phonon and defect to the anomalous Hall effect a''/a'in Mn-Ru-V-Ga,resulting in a scaling relation a"/a'∝RRR1.8.

compensated ferrimagnetanomalous Hall effectresidual resistivity ratio

梁瑾静、郗学奎、王文洪、刘永昌

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Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

University of Chinese Academy of Sciences,Beijing 100049,China

Tiangong University,Tianjin 300387,China

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaBeijing Natural Science Foundation,China

2022YFA140260012274438Z230006

2024

10.1088/1674-1056/ad34c8

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(7)
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