Influence of high-pressure heat treatment on magnetocaloric effects and magnetic phase transition in single crystal Gd3Ga5O12

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外文摘要：The magnetic properties and magnetic phase transition critical behavior of Gd3Ga5O12 single crystals subjected to high-pressure heat treatment were investigated.The results show that high-pressure heat treatment reduces the Curie temperature and magnetization of the sample.Under a magnetic field change of 5 T,the maximum isothermal magnetic entropy of the sample is approximately 19.73 J/(kg·K).High-pressure heat treatment increases the phase transition temperature range and leads to an increase in the magnetic refrigeration power.Both Gd3Ga5O12 single crystals and the high-pressure heat-treated sample undergo a second-order phase transition.The critical behavior of the samples aligns with the mean field model acquired via critical model fitting.This indicates that the samples exhibit long-range exchange interactions in the system near the Curie temperature.Thus,this material can be used as a magnetic refrigerant for low-temperature applications.

外文关键词：

Magnetic refrigerationHigh-pressure heat treatmentMagnetocaloric effectMagnetic phase transitionRare earths

作者：

Xiang Jin、Jing Zhao、Lei Gao、Huaijin Ma、Haschuluu Oimod、Hongwei Zhu、Qi Li、Taichao Su、Hongyu Zhu、Tegus O、Jianjun Zhao

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作者单位：

Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials,Inner Mongolia Normal University,Hohhot,010022,China

School of Physical Science and Technology,Baotou Teachers'College,Key Laboratory of Magnetism and Magnetic Materials for Higher Education in Inner Mongolia Autonomous Region,Baotou,014030,China

National Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou,014030,China

College of Science,Guilin University of Technology,Guilin,541004,China

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基金：

Guangxi Natural Science FoundationGuangxi Natural Science FoundationNational Natural Science Foundation of China2021 Intramural Project-Study on High-Pressure Preparation,Magnetism,and Magnetocaloric Effect of the La0.75Sr0.25Mn1-xCoxO3Series Polycrystalline Samples

项目编号：

AD20297001AD2029701451562032x=0.0-0.230234013

出版年：

2024

DOI：

10.1016/j.jre.2024.01.003

稀土学报(英文版)

中国稀土学会

稀土学报(英文版)

CSTPCDEI

影响因子：1.3

ISSN：1002-0721

年,卷(期)：2024.42(11)