Inter-particle interactions and the magnetocaloric effect in a sample of ultrafine particles in Hg
作者： M S Pedersen , S Mørup , S Linderoth , C Johansson , M Hanson
DOI: 10.1088/0953-8984/9/34/010
关键词:
摘要: Ultrafine magnetic particles consisting of a metastable iron - mercury alloy in Hg have been investigated by Mossbauer spectroscopy and magnetization measurements. It was found that the interact strongly, around 100 K there is transition from superparamagnetic state to which moments are ordered. The entropy change induced application field determined temperature range 70 200 K. When sample magnetized 1 T almost constant 130 In an applied 0.1 T, lower, decreased with increasing same range. A model takes into account interactions between give better description than for non-interacting particles.
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