Magnetocaloric properties of La1-xPbxMnO3 (X=0.1, 0.2, 0.3) compounds

被引：36

作者：

Min, SG ^{[1
]}

Kim, KS

Yu, SC

Suh, HS

Lee, SW

机构：

[1] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

[2] Korea Inst Energy Res, Taejon 305343, South Korea

[3] Chungnam Natl Univ, Dept Engn Met, Cheongju 361764, South Korea

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2005年 / 41卷 / 10期

关键词：

adiabatic temperature change; entropy change; magnetocaloric effect (MCE);

D O I：

10.1109/TMAG.2005.854823

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The magnetization behaviors have been investigated for La1-xPbxMnO3 (x = 0.1, 0.2, 0.3) alloys. The Curie temperature increased from 195 to 352 K with increasing Pb concentration. A large magnetic entropy change (Delta S-M), which is calculated from H versus M curves associated With the ferromagnetic-paramagnetic transitions, has been observed. The maximum Delta S-M of La-0.8 Pb-0.2 MnO3 was 1.22 J/kg K at 294 K for an applied field of 1.5 T. Adiabatic temperature change (Delta T-ad) was measured directly by a special cryostat. The maximum Delta T-ad of La0.7Pb0.3MnO3 was 1.00 K at 352 K for an applied field of 2 T.

引用

页码：2760 / 2762

页数：3

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