Understanding low field microwave absorption in Ni-Mn based Heusler alloy films

被引：3
作者：
Modak, Rajkumar [1 ,3 ]
Srinivasan, Ananthakrishnan [1 ]
Srinivasu, Vallabhapurapu Vijaya [2 ]
机构：
[1] Indian Inst Technol Guwahati, Dept Phys, Gauhati 781039, India
[2] Univ South Africa, Dept Phys, ZA-1710 Johannesburg, South Africa
[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
MATERIALS RESEARCH BULLETIN | 2021年 / 143卷
关键词：
Microwave resonance; Thin films; Heusler alloy; Low field microwave absorption; Magnetic property; MAGNETORESISTANCE; NANOPARTICLES; TEMPERATURE; DEPENDENCE; RESONANCE;
D O I：
10.1016/j.materresbull.2021.111453
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Low field microwave absorption (LFMA) signal has been observed for the first time in room temperature microwave spectra recorded at 9.44 GHz in polycrystalline Ni-Mn-Sn Heusler alloy films. The observed LFMA spectra is different from conventional ferromagnetic resonance and poses hysteresis near the zero field region of the spectrum. The observed LFMA spectra can be well correlated with the isothermal magnetization (M - H) loops recorded at different film orientations to the applied dc magnetic field from 0 degrees to 90 degrees. Furthermore, with small Fe, Co substitution in Ni-Mn-Sn film, both LFMA signal as well as the M - H loop properties of these films varied in a correlated manner, signifying a strong dependence of LFMA on the magnetization process in these films. The demonstration is useful both for fundamental and application point of view for characterization of magnetic materials and explore their applications in microwave assisted nanoelectronic devices.
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页数：6
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