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
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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