The 10 mol% Al‐substituted yttrium orthoferrite (YFe0.9Al0.1O3) crystal becomes uniaxially antiferromagnetic at 602 °K. It exhibits weak ferromagnetism at about 600 °K. The magnetization data were used to test the models for the origin of weak ferromagnetism. The antisymmetrical exchange (Dzyaloshinsky‐Moriya) model was found to be a better suited model. Parameters for the model were calculated from the data.
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Wang et al. (1968) studied this question.
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