Magnetic properties and magnetocaloric effects in Eu(Ti,Nb,Mn)O3 perovskites

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：In perovskite EuTiO3,the magnetic characteristics and magnetocaloric effect(MCE)can be flexibly regulated by converting the magnetism from antiferromagnetic to ferromagnetic.In the present work,a series of Eu(Ti,Nb,Mn)O3 compounds,abbreviated as ETNMO for convenience of description,was fabri-cated and their crystallography,magnetism together with cryogenic magnetocaloric effects were sys-tematically investigated.The crystallographic results demonstrate the cubic perovskite structure for all the compounds,with the space group of Pm3m.Two magnetic phase transitions are observed in these second-order phase transition(SOPT)materials.The joint substitution of elements Mn and Nb can considerably manipulate the magnetic phase transition process and magnetocaloric performance of the ETNMO compounds.As the Mn content increases,gradually widened-ASM-T curves are obtained,and two peaks with a broad shoulder are observed in the-ASM-T curves for △μ0H≤0-1 T.Under a field change of 0-5 T,the values of maximum magnetic entropy change(-ASMmax)and refrigeration capacity(RC)are evaluated to be 34.7 J/(kg·K)and 364.9 J/kg for EuTi0.8625Nb0.0625Mn0.075O3,27.8 J/(kg-K)and 367.6 J/kg for EuTi0.8375Nb0.0625Mn0.1O3,23.2 J/(kg·K)and 369.2 J/kg for EuTi0.8125Nb0.0625Mn0.125O3,17.1 J/(kg·K)and 357.6 J/kg for EuTi0.7875Nb0.0625Mn0.15O3,respectively.The considerable MCE parameters make the ETNMO compounds potential candidates for cryogenic magnetic refrigeration.

外文关键词：

ETNMO perovskitesCryogenic refrigerationMagnetic phase transitionMagnetocaloric effectRare earths

作者：

Junfeng Wang、Huicai Xie、Quanyi Liu、Zhihong Hao、Zhaojun Mo、Qi Fu、Xinqiang Gao、Jun Shen

展开 >

作者单位：

Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou,341119,China

Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou,341000,China

School of Rare Earth and New Materials Engineering,Gannan University of Science and Technology,Ganzhou,341000,China

Department of Energy and Power Engineering,School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081,China

展开 >

基金：

Research Projects of Ganjiang Innovation Academy,Chinese Academy of Sciences

项目编号：

E055B002

出版年：

2024

DOI：

10.1016/j.jre.2023.06.015

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(8)