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首页> 外文期刊>IEEE Transactions on Magnetics >Temperature dependence of magnetocrystalline anisotropy for Sn substituted Ba ferrite particles
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Temperature dependence of magnetocrystalline anisotropy for Sn substituted Ba ferrite particles

机译：Sn取代Ba铁氧体颗粒磁晶各向异性的温度依赖性

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摘要

Temperature dependence of magnetocrystalline anisotropy was measured for Co-Ti-Sn substituted Ba ferrite particles, to clarify the origin of a small temperature dependence of coercivity (dHc/dT) for this material. For comparison, the same measurement was carried out for Co-Ti substituted particles which have positive dHc/dT near room temperature. First and second anisotropy constants K/sub 1/ and K/sub 2/ were found to be both positive for these materials. In the Co-Ti-Sn particles, K/sub 1/ was dominant over K/sub 2/ over the whole temperature range, and K/sub 1/ decreased rapidly with increasing temperature. The rapid decrease in K/sub 1/ explains the experimental small dHc/dT. In the case of Co-Ti particles, K/sub 2/ is not negligible below 0 degrees C. The decrease in Hc with increasing temperature for the Co-Ti particles at a low temperature range is due to the decrease in K/sub 2/. The predicted temperature dependencies of Hc derived by using the K/sub 1/ and K/sub 2/ values for the two kinds of materials explain the material results.
机译：测量了Co-Ti-Sn取代的Ba铁氧体颗粒的磁晶各向异性的温度依赖性，以阐明这种材料的矫顽力（dHc / dT）的较小温度依赖性的起因。为了比较，对在室温附近具有正dHc / dT的Co-Ti取代的颗粒进行了相同的测量。对于这些材料，发现第一和第二各向异性常数K / sub 1 /和K / sub 2 /均为正。在Co-Ti-Sn颗粒中，在整个温度范围内，K / sub 1 /优于K / sub 2 /，并且随着温度升高，K / sub 1 /迅速降低。 K / sub 1 /的快速下降说明了实验中的小dHc / dT。在Co-Ti颗粒的情况下，在0摄氏度以下时K / sub 2 /不可忽略。在低温范围内，Co-Ti颗粒的Hc随温度升高而降低是由于K / sub 2的降低/。通过使用两种材料的K / sub 1 /和K / sub 2 /值得出的Hc的预测温度依赖性解释了材料结果。

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