Magnetocaloric effect in antiferromagnetic Dy3Co compound

被引：53

作者：

Shen, Jun ^{[1
]}

Zhao, Jin-Liang ^{[4
]}

Hu, Feng-Xia ^{[2
,3
]}

Rao, Guang-Hui ^{[2
,3
]}

Liu, Guang-Yao ^{[2
,3
]}

Wu, Jian-Feng ^{[1
]}

Li, Yang-Xian ^{[4
]}

Sun, Ji-Rong ^{[2
,3
]}

Shen, Bao-Gen ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 99卷 / 04期

基金：

中国国家自然科学基金;

关键词：

MAGNETIC ENTROPY CHANGE; METAMAGNETIC TRANSITION; PHASE-TRANSITIONS; REFRIGERATION; MAGNETORESISTANCE; ALLOYS;

D O I：

10.1007/s00339-010-5613-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties and magnetocaloric effects (MCEs) of the Dy3Co compound are studied. Two successive magnetic transitions: the antiferromagnetic (AFM)-to-AFM transition at T (AF) =29 K and the AFM-to-paramagnetic (PM) transition with increasing temperature at the N,el temperature T (N) =44 K are observed. Dy3Co undergoes a field-induced metamagnetic transition from the AFM to the ferromagnetic (FM) state below T (N) , giving rise to a large MCE. The maximal value of magnetic entropy change Delta S (m) is -13.9 J/kg K with a refrigerant capacity (RC) of 498 J/kg around T (N) for a field change of 0-5 T. A sign change of MCE in Dy3Co with magnetic field and temperature is observed near the critical field where the metamagnetic transition occurs.

引用

页码：853 / 858

页数：6