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Electronic structure calculations in ordered and disordered solids with spiral magnetic order

机译:具有螺旋磁序的有序和无序固体中的电子结构计算

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摘要

A scheme to calculate the electronic structure of systems having a spiral magnetic structure is presented. The approach is based on the Korringa-Kohn-Rostoker Green's function formalism which allows, in combination with the coherent potential approximation alloy theory, dealing with chemically disordered materials. It is applied to the magnetic random alloys Fe_xNi_(1-x), Fe_xCo_(1-x), and Fe_xMn(1-x). For these systems the stability of their magnetic structure was analyzed. For Fe_xNi_(1-x) the spin stiffness for was determined as a function of concentration that was found in satisfying agreement with experiment. Performing spin spiral calculations the longitudinal momentum-dependent magnetic susceptibility was calculated for pure elemental systems (Cr, Ni) in the nonmagnetic state as well as for random alloys (Ag_xPt_(1-x). The obtained susceptibility was used to analyze the stability of the paramagnetic state of these systems.
机译:提出了一种计算具有螺旋磁结构的系统的电子结构的方案。该方法基于Korringa-Kohn-Rostoker Green的函数形式主义,该函数主义与相干势近似合金理论相结合,可以处理化学无序的材料。它适用于磁性无规合金Fe_xNi_(1-x),Fe_xCo_(1-x)和Fe_xMn(1-x)。对于这些系统,分析了其磁性结构的稳定性。对于Fe_xNi_(1-x),将自旋刚度确定为浓度的函数,该浓度与实验相符。通过进行自旋螺旋计算,计算出了非磁性状态下的纯元素体系(Cr,Ni)以及无规合金(Ag_xPt_(1-x))的纵向动量相关磁化率,并利用所获得的磁化率来分析了合金的稳定性。这些系统的顺磁状态。

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  • 来源
    《Physical review》 |2011年第14期|p.144401.1-144401.9|共9页
  • 作者单位

    Department of Chemistry, Physical Chemistry, Ludwig Maximilian University, Butenandtstrasse 11, D-81377 Munich, Germany;

    Institut fuer Anorganische Chemie und Analytische Chemie, Johannes-Gutenberg-Universitaet, D-55099 Mainz, Germany;

    Department of Chemistry, Physical Chemistry, Ludwig Maximilian University, Butenandtstrasse 11, D-81377 Munich, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    methods of electronic structure calculations; metals, semimetals, and alloys; spin waves;

    机译:电子结构计算方法;金属;半金属和合金;自旋波;

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