Abstract
We describe the results of magnetization and Mössbauer studies under high magnetic field on amorphous Fe 80- x Er x B 12Si 8 alloys with 0 ≤ x ≤ 15. The Er moment is 8μ B at 4.2 K which indicates a conical spin structure with an average cone angle of 54°. The Fe moment decreases only slightly with increasing x. For x = 15, the field dependence of magnetization shows a discontinuity at H = 3 T and it begins to increase remarkably with H. This is attributed, in the light of Mössbauer experiments under fields, to the opening of the canted Fe spin structure. The results are discussed.
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