A giant magnetocaloric effect in EuTi0.875Mn0.125O3 compound

被引：16

作者：

Mo, ZhaoJun ^{[1
]}

Sun, QiLei ^{[2
]}

Shen, Jun ^{[4
]}

Wang, ChangHong ^{[3
]}

Meng, FanBin ^{[2
]}

Zhang, MoHan ^{[1
]}

Huo, Ying ^{[1
]}

Li, Lan ^{[1
]}

Liu, GuoDong ^{[2
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Inst Mat Phys,Key Lab Display Mat & Photoelect De, Minist Educ,Key Lab Optoelect Mat & Devices Tianj, Tianjin 300191, Peoples R China

[2] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin, Peoples R China

[3] Tianjin Univ Technol, Sch Sci, Tianjin 300191, Peoples R China

[4] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 753卷

基金：

中国国家自然科学基金;

关键词：

Magnetocaloric effect; Magnetic entropy change; Refrigerant capacity; MAGNETIC REFRIGERATION; MN-SUBSTITUTION; TEMPERATURE; MANGANITES; TRANSITION; BEHAVIOR; EUTIO3; CR;

D O I：

10.1016/j.jallcom.2018.03.247

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The magnetic properties and magnetocaloric effect of EuTi0.875Mn0.125O3 compounds are investigated. EuTi0.875Mn0.125O3 compounds show the ferromagnetic to paramagnetic magnetic transition at T-c = 5.5 K. There are 15.48% Eu2+ ions that change into Eu3+, because the concentrations of Mn2+ and Mn4+ are 7.74% and 4.76% in the EuTi0.875Mn0.125O3 compounds. Although, the magnetic moments were decreased, the utilization of spin entropy of Eu2+: 4f(7) localized moments was improved. A giant reversible magnetocaloric effect was observed in EuTi0.875Mn0.125O3 compounds. The maximum value of magnetic entropy change are (12.3 and 23.3 J/kg K), and the values of RC were evaluated to be 46 and 123 J/kg for a field change of 1 and 2 T, without thermal and field hysteresis loss. Therefore, the giant reversible MCE and large RC make the EuTi0.875Mn0.125O3 compound a good candidate for magnetic refrigerant working at low-temperature and low-field. (C) 2018 Published by Elsevier B.V.

引用

页码：1 / 5

页数：5

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