稀土金属间化合物GdRhIn的结构、磁性和磁热性能

Structural, Magnetic, and Magneto-Thermal Properties of Rare Earth Intermetallic GdRhIn.

作者信息

Kumar Ravinder, Maz Arrab Ali, Mishra Satyendra Kumar, Gupta Sachin

机构信息

Department of Physics, Bennett University, Greater Noida 201310, India.

Space and Resilient Communications and Systems (SRCOM), Center Technologic de Telecomunicacions de Catalunya (CTTC), Avinguda Carl Friedrich Gauss, 11, 08860 Castelldefels, Spain.

出版信息

Sensors (Basel). 2024 Sep 30;24(19):6326. doi: 10.3390/s24196326.

DOI:10.3390/s24196326

PMID:39409366

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11479236/

Abstract

We study the structural, magnetic, and magneto-thermal properties of the GdRhIn compound. The room-temperature X-ray diffraction measurements show a hexagonal crystal structure. Temperature and field dependence of magnetization suggest two magnetic transitions-antiferromagnetic to ferromagnetic at 16 K and ferromagnetic to paramagnetic at 34 K. The heat capacity measurements confirm both the magnetic transitions in GdRhIn. The magnetization data were used to calculate isothermal magnetic entropy change and refrigerant capacity in GdRhIn, which was found to be 10.3 J/Kg-K for the field change of 70 kOe and 282 J/Kg for the field change of 50 kOe, respectively. The large magnetocaloric effect in GdRhIn suggests that the material could be used for magnetic refrigeration at low temperatures.

摘要

我们研究了GdRhIn化合物的结构、磁性和磁热性能。室温X射线衍射测量表明其具有六方晶体结构。磁化强度随温度和磁场的变化表明存在两个磁转变——在16 K时从反铁磁转变为铁磁，在34 K时从铁磁转变为顺磁。热容测量证实了GdRhIn中的这两个磁转变。利用磁化数据计算了GdRhIn的等温磁熵变和制冷量，发现对于70 kOe的磁场变化，等温磁熵变为10.3 J/Kg-K，对于50 kOe的磁场变化，制冷量为282 J/Kg。GdRhIn中较大的磁热效应表明该材料可用于低温磁制冷。