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arXiv 0808.0975cond-mat.mtrl-scicond-mat.stat-mech
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Fe_{2-x} T_xP(T = Ru和Rh)磁热性质的电子结构计算和磁化强度测量

Magnetocaloric properties of Fe_{2-x}T_xP (T = Ru and Rh) from electronic structure calculations and magnetisation measurements

B. Wiendlocha, J. Tobola, S. Kaprzyk, R. Zach, E. K. Hlil, D. Fruchart

摘要:

基于KKR-CPA电子结构计算和磁化强度M(H,T)测量,分析了纯Fe_2 P化合物和取代Fe_2 P化合物的磁热性质。计算的电子态密度和磁矩被用来计算电子熵和磁熵的值,这与实验结果相当一致。为了揭示居里温度以上的磁性,我们用无序局域矩(DLM)的概念模拟了顺磁态的行为。KKR-CPA计算表明,在Fe_2 P中,(3f)位的Fe磁矩在DLM态下消失,而(3g)位的磁矩与低温铁磁态相比仅略有降低。

英文摘要:

An analysis of the magnetocaloric properties of the pure and substituted Fe2P compounds is made based on KKR-CPA electronic structure calculations and magnetisation M(H,T) measurements. The computed electronic densities of states and magnetic moments are used to calculate both the values of the electronic and magnetic entropies, which fairly agree with the experimental findings. To enlighten the magnetic properties above Curie temperature, the paramagnetic state behaviours are simulated using the disordered local moments (DLM) concept. The KKR-CPA computations show, that in Fe2P, the Fe magnetic moment of the (3f) site disappears in the DLM state, while the moment of the (3g) site is only little lowered, comparison made with the low temperature ferromagnetic state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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