Field-induced spin reorientation in erbium-iron-manganese-boron

Pinkerton, F. E.; Fuerst, C. D.; Meisner, G. P.
June 1988
Applied Physics Letters;6/20/1988, Vol. 52 Issue 25, p2188
Academic Journal
Er2Fe14B undergoes a spin reorientation from a low-temperature planar moment orientation to a high-temperature axial orientation at Ts=336 K. We report for the first time that the planar to axial reorientation can be induced at temperatures below Ts by applying a sufficiently large magnetic field. Room-temperature reorientation in Er2Fe14B is induced at a field of about 120 kOe. Investigation of Er2Fe14-xMnxB compounds shows that the field required to induce reorientation decreases as T approaches Ts from below. The magnetic moment is larger in the axial orientation than in the planar orientation; hence, reorientation occurs at the field where the magnetostatic energy gained by the larger axial moment overcomes the unfavorable anisotropy energy at temperatures near Ts.


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