Dubiel Łukasz, Stefaniuk Ireneusz, Wal Andrzej
Department of Physics and Medical Engineering, Faculty of Mathematics and Applied Physics, Rzeszow University of Technology, Powstancow Warszawy 12, 35-959 Rzeszow, Poland.
Institute of Materials Enginering, College of Natural Sciences, University of Rzeszow, Rejtana 16a, 35-310 Rzeszow, Poland.
Materials (Basel). 2022 Aug 31;15(17):6016. doi: 10.3390/ma15176016.
This paper contains a detailed study of low-field microwave absorption, which is observed in EMR spectra registered for a series of Ni50-xCoxMn35.5In14.5 (x=0,3,5) Heusler alloys polycrystalline in situ and annealed at 1173 K ribbons. The LFMA spectra for all ribbons were performed at X-band (∼9.5 GHz), at temperatures below Curie temperature. Additionally, for annealed Ni45Co5Mn35.5In14.5 ribbons, the LFMA signal dependencies of the external magnetic field modulation amplitude, modulation frequency, microwave power and microwave magnetic field phase were registered. These results confirm the resonant character of LFMA. To determine the basic EMR parameters, such as linewidth and resonance field, the experimental data were fitted by the Dyson function. The LFMA signal is satisfactorily matched by the two lines, and the variability of the component lines with temperature is remarkable.
本文包含对低场微波吸收的详细研究，该现象在一系列原位多晶且在1173 K下退火的Ni50-xCoxMn35.5In14.5（x = 0,3,5）赫斯勒合金薄带的电子磁共振（EMR）光谱中被观测到。所有薄带的低场微波吸收（LFMA）光谱是在X波段（约9.5 GHz）、低于居里温度的温度下进行测量的。此外，对于退火后的Ni45Co5Mn35.5In14.5薄带，记录了低场微波吸收信号与外部磁场调制幅度、调制频率、微波功率和微波磁场相位的依赖关系。这些结果证实了低场微波吸收的共振特性。为了确定诸如线宽和共振场等基本电子磁共振参数，实验数据用戴森函数进行拟合。低场微波吸收信号与两条谱线拟合良好，且组成谱线随温度的变化显著。
