Abstract

Defects in magnetic systems often have a drastic impact on the magnetic state, particularly the anisotropy. In this letter, we show that magnetic torque analysis with appropriate phenomenological theoretical treatment can be used to analyze in detail the magnetic state in complex heterogeneous materials. We base our study on the Fe7S8 omission structure, which exhibits a non-trivial temperature dependence of magnetic anisotropy, involving incoherent out-of-plane spin rotation due to an elaborate defect distribution.

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