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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Influence of the demagnetizing factor on the magnetization of an ensemble of Stoner-Wohlfarth particles
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Influence of the demagnetizing factor on the magnetization of an ensemble of Stoner-Wohlfarth particles

机译：退磁因子对斯托纳-沃尔法斯粒子团的磁化强度的影响

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摘要

The influence of the demagnetizing factor on the coercivity of a sample of oriented uniaxial Stoner-Wohlfarth particles is investigated in the approximation of a relaxation model with a self-consistent determination of the demagnetization field. The demagnetizing field is shown to change the particle magnetization reversal conditions and to reduce the blocking temperature and coercivity, for which, despite allowance for the demagnetizing field, the Neel-Brown relation holds. It is also shown that under the demagnetizing field, the internal magnetic field in which the particles are located is not stationary but varies with time concordantly with the time sweep of the temperature during magnetization in a constant external field after zero-field cooling (ZFC). Nonstationarity of the internal field in the ZFC regime causes the interval of transition temperatures of the ensemble particles from a blocked state to a state with equilibrium magnetization to increase.
机译：在松弛模型近似的情况下，通过自洽确定退磁场，研究了退磁因子对定向单轴斯托纳-沃尔法斯粒子样品矫顽力的影响。示出了退磁场改变了颗粒磁化反转条件并降低了粘连温度和矫顽力，为此，尽管考虑了退磁场，但Neel-Brown关系成立。还表明，在退磁场下，零磁场冷却（ZFC）后在恒定的外场中，粒子所在的内部磁场不是固定的，而是随时间变化，与磁化过程中温度的时间扫描一致。 。 ZFC方案中内部场的非平稳性导致整体粒子从阻塞状态到具有平衡磁化状态的转变温度的间隔增加。

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