Extraordinary magnetization behavior of single crystalline TbFe_4.4Al_7.6

Details Extraordinary magnetization behavior of single crystalline TbFe_4.4Al_7.6 Extraordinary magnetization behavior of single crystalline TbFe_4.4Al_7.6

2001-11-21

arxiv.org/abs/cond-mat/0111408v1

Phys. Rev. B 65, 020408(R) (2001)

Physics

Condensed Matter

Materials Science

pdf file, 14 pages, 3 figures; PRB in print

Scientific paper

10.1103/PhysRevB.65.020408

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 TbFe_4.4Al_7.6 (tetragonal ThMn_12 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: epsilon_aa = - epsilon_bb ~ 3.5x10^-4 that is associated with a magnetic hardness (mu_0H_C ~ 3 T) that is unprecedented in this category of materials.

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