Magnetic properties of ferromagnetic Heusler alloy Co2ZrSn
Magnetic properties of ferromagnetic Heusler alloy Co2ZrSn
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DOI：
10.1016/j.jpcs.2022.110635
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发表时间：
2022-02
影响因子：
4
通讯作者：
T. Kanomata;Y. Amako;Y. Ida;Y. Adachi;T. Osaki;T. Eto;H. Nishihara;I. Shigeta;S. Imada;M. Doi
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文献类型：
--
作者：
T. Kanomata;Y. Amako;Y. Ida;Y. Adachi;T. Osaki;T. Eto;H. Nishihara;I. Shigeta;S. Imada;M. Doi
本文报道了Co_2ZrSn的晶体结构、磁导率、磁化强度和穆斯堡尔谱的实验研究结果。通过电弧熔炼制备的样品由与少量杂质相共存的Heusler结构Co2 ZrSn组成。测得Co_2ZrSn的居里温度TC为452.3K。在1.8 K下，Co_2ZrSn的磁矩估计为2.0 μB/f.u.，证实了Co_2ZrSn的磁矩服从Slater-Pauling规则。当自旋S = 1/2时，自发磁化强度Ms随温度的变化近似服从布里渊函数.而在T/TC> 0.6的温度范围内，Ms明显高于布里渊函数。Co_2Zr_Sn的相变温度几乎与压力无关。穆斯堡尔谱测量结果表明，该化合物的同分异构体位移I.S. (1.5 mm/s（295 K）的温度依赖性。在95 K时，Sn核处的超精细磁场HhfSn的值为101 kOe。当S = 1/2时，Co2 ZrSn的HfSn的温度变化基本遵循布里渊函数.根据实验结果，讨论了Co_2ZrSn的电磁性质。
The results of experimental investigations of the crystal structure, permeability, magnetization and Mössbauer spectroscopy of Co2ZrSn are reported. The sample, which was prepared by arc melting, comprised of a Heusler structure Co2ZrSn that coexisted with a small amount of an impurity phase. The Curie temperatureTCof Co2ZrSn was found to be 452.3 K. At 1.8 K the magnetic moment of Co2ZrSn was estimated to be 2.0 μB/f.u., confirming that the magnetic moment of Co2ZrSn obeys the Slater-Pauling rule. The temperature variation of the spontaneous magnetizationMsroughly follows the Brillouin function for spin valueS= 1/2. However, in the temperature region ofT/TC> 0.6,Msis distinctly higher than the Brillouin function. TheTCof Co2ZrSn was almost independent of pressure. The Mössbauer spectroscopy measurements showed that the isomer shiftI.S.(1.5 mm/s at 295 K) was approximately temperature independent. At 95 K the value of the hyperfine magnetic fieldHhfSnat the Sn nuclei was found to be 101 kOe. The temperature variation ofHhfSnof Co2ZrSn roughly followed the Brillouin function forS= 1/2. On the basis of the experimental results, the electronic and magnetic properties of Co2ZrSn are discussed.