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Extraordinary magnetization behavior of single crystalline TbFe4.4Al7.6

N. P. Duong, E. Brueck, P. E. Brommer, A. de Visser, F. R. de Boer, K. H. J. Buschow

cond-mat.mtrl-sciarXiv:cond-mat/0111408

Abstract

We report the observation of a field-induced transformation from the easy-plane antiferromagnetic structure to the easy-axis ferrimagnetic structure in a single crystal of TbFe4.4Al7.6 (tetragonal ThMn12 structure) at 5 K. Such a field-induced, irreversible transition has been identified for the first time. This transition is accompanied by a giant orthorhombic distortion: epsilonaa = - epsilonbb ~ 3.5x10-4 that is associated with a magnetic hardness (mu0HC ~ 3 T) that is unprecedented in this category of materials.

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