Magnetic properties and magnetocaloric effect in TbCo2-xFex compounds

• 来源期刊: 中国物理B（英文版）
• 关键词: mangetocaloric effect mean field approximation metamagnetic transition
• 年，卷（期）: 2007,（12）
• 页码范围: 3843-3847
• 页数: 5页
• 语种: 英文

摘要

Magnetic properties and magnetocaloric effect in TbCo2-xFex compounds are studied by DC magnetic measurement. With increasing content of Fe, the entropy changes decrease slightly, though the Curie temperature is tuned from 231 K (x = 0) to 303 K (x = 0.1). Magnetic entropies of TbCo2 compound are calculated by using mean field approximation (MFA). Results estimated by using Maxwell relation are consistent with that of MFA calculation. It si shown that the entropy changes are mainly derived from the magnetic entropy change. The lattice has almost no contribution to the entropy change in the vicinity of phase transition.