Influences of La and Ce doping on giant magnetocaloric effect of EuTiO

• 来源期刊: 中国物理B（英文版）
• 关键词: magnetocaloric effect magnetic entropy change magnetic phase transformation
• 年，卷（期）: 2018,（1）
• 页码范围: 552-556
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/1/017501

摘要

Giant reversible magnetocaloric effects and magnetic properties in Eu0.9R0.1TiO3 (R=La, Ce) are investigated. The antiferromagnetic ordering of pure EuTiO3 can significantly change to be ferromagnetic as substitution of La (x=0.1) and Ce (x=0.1) ions for Eu2+ ions. The values of??SM and RC are evaluated to be 10.8 J/(kg·K) and 51.8 J/kg for Eu0.9Ce0.1TiO3 and 11 J/(kg·K) and 39.3 J/kg for Eu0.9La0.1TiO3 at a magnetic field change of 10 kOe, respectively. The large low-field enhancements of??SM and RC can be attributed to magnetic phase transition. The giant reversible MCE and large RC suggest that Eu0.9R0.1TiO3 (R=La, Ce) compounds could be promising materials in low temperature and low magnetic field refrigerants.