Second-order anisotropy due to magnetostriction for L10-FePt

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Solid State Sciences Pub Date : 2025-02-01 DOI:10.1016/j.solidstatesciences.2024.107782

D. Legut , P. Nieves

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Abstract

The effective magnetocrystalline anisotropy energy associated with magnetostriction is studied for tetragonal L1

_{0}

-FePt by means of first-principles calculations, which is expressed in terms of the intrinsic anisotropy for an undeformed crystal, the magnetostrictive coefficients, and the elastic tensor. A very small correction is found for the first anisotropy constant

Δ K_{1} / K_{1} = 0.07

%, while a much more significant contribution is obtained for the second one

Δ K_{2} / K_{2} = 21.86

%. General analysis of this effect for tetragonal crystals is provided, finding that

Δ K_{1}

will be always positive for any stable phase with this symmetry. The potential implications and applications of these results are discussed.

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L10-FePt磁致伸缩引起的二阶各向异性

用第一性原理计算方法研究了与磁致伸缩有关的四角形L10-FePt的有效磁晶各向异性能，用未变形晶体的本征各向异性、磁致伸缩系数和弹性张量表示。第一个各向异性常数ΔK1/K1=0.07%的修正很小，而第二个各向异性常数ΔK2/K2=21.86%的修正更大。对四边形晶体的这种效应进行了一般分析，发现ΔK1对于任何具有这种对称性的稳定相总是正的。讨论了这些结果的潜在意义和应用。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.