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Computations on a relaxed model of a rigid ferromagnet

机译:刚性铁磁体松弛模型的计算

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Abstract: In this paper we do computations that describe a rigid, uniaxial, ferromagnetic material in a varying applied magnetic field. Our computations are based on a relaxed model with a nonlocal exchange energy. The model is based on the theory of Young-measures, but we show that our calculations can be based on only the first and second moments. Thus, we can do rigorous and accurate calculations without examining the full oscillating sequences that induce the Young-measure. We show that by varying the strength of the exchange energy we can induce hysteresis and observe hysteresis subloops and domain rotation. !12
机译:摘要:在本文中,我们进行了描述在变化的施加磁场中的刚性单轴铁磁材料的计算。我们的计算基于具有非本地交换能量的松弛模型。该模型基于Young-measures理论,但是我们证明了我们的计算只能基于第一和第二矩。因此,我们可以进行严格而准确的计算,而无需检查引起杨氏测度的完整振荡序列。我们表明,通过改变交换能量的强度,我们可以引起磁滞现象,并观察磁滞子回路和磁畴旋转。 !12

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