Calculating the magnetocaloric effect in second-order-type material by micromagnetic simulations: A case study on Co2B
Calculating the magnetocaloric effect in second-order-type material by micromagnetic simulations: A case study on Co2B
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通过微磁模拟计算二阶材料的磁热效应:以 Co2B 为例
DOI:
10.1016/j.scriptamat.2019.10.039
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发表时间:
2020-03
影响因子:
6
通讯作者:
Bai-Xiang Xu
中科院分区:
文献类型:
--
作者:
Dominik Ohmer;Min Yi;Maximilian Fries;Oliver Gutfleisch;Bai-Xiang Xu
We propose a calculation scheme which integrates micromagnetic simulations and the Arrott–Noakes equation for the investigation of the influence of microstructure and magnetocrystalline anisotropy on the magnetocaloric effect (MCE) in second-order magnetic phase transition materials. Using the Arrott–Noakes equation, the micromagnetic simulation results are extrapolated to temperatures above Curie temperature and applied to MCE calculations. With Co 2 B as model material, we found that increasing magnetocrystalline anisotropy facilitates higher isothermal entropy changes (Δ S T). The grain size reduction results in increased Δ S T for constant saturation magnetization (M S), while Δ S T decreases for a reduction of M S with reduced grain size.
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