The Spin-Disorder Resistivity: The Disordered Local Moment Approach

Abstract:

The spin-disorder resistivity (SDR) of a broad range of magneticmaterials, both ordered and disordered, is reviewed.We identify the SDR at the critical temperature with the residualresistivity of the corresponding system evaluated in the frameworkof the disordered local moment (DLM) model.The underlying electronic structure is determined in the frameworkof the tight-binding linear muffin-tin orbital method which employsthe coherent potential approximation to describe the DLM stateand chemical disorder.The DLM fixed-spin moment method is used in the case when the DLMmoment collapses.The Kubo-Greenwood approach is employed to estimate the resistivityof the DLM state.Formalism is applied to Fe and Ni and its alloys, Heusler alloys,and ordered ferromagnetic and antiferromagnetic alloys.Finally, the SDR of the Earth's core will be studied using thesame formalism.Calculations are compared with available experimental data.

• Periodical: Solid State Phenomena (Volume 289)
• Pages: 185-191
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.289.185
• Online since: April 2019
• Authors: J. Kudrnovsky*, Vaclav Drchal, Ilja Turek, David Wagenknecht, Sergii Khmelevskyi
• Keywords: Disordered Local Moments, Earth's Core Conductivity, First-Principle, Heusler Alloy, Magnetic Metals, Spin Disorder Resistivity

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