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Tunable dimensional crossover and magnetocrystalline anisotropy in Fe2P-based alloys

I. A. Zhuravlev, V. P. Antropov, A. Vishina, M. van Schilfgaarde, and K. D. Belashchenko
Phys. Rev. Materials 1, 051401(R) – Published 11 October 2017

Abstract

Electronic structure calculations are used to examine the magnetic properties of Fe2P-based alloys and the mechanisms through which the Curie temperature and magnetocrystalline anisotropy can be optimized for specific applications. It is found that at elevated temperatures the magnetic interaction in pure Fe2P develops a pronounced two-dimensional character due to the suppression of the magnetization in one of the sublattices, but the interlayer coupling is very sensitive to band filling and structural distortions. This feature suggests a natural explanation for the observed sharp enhancement of the Curie temperature by alloying with multiple elements, such as Co, Ni, Si, and B. The magnetocrystalline anisotropy is also tunable by electron doping, reaching a maximum near the electron count of pure Fe2P. These findings enable the optimization of the alloy content, suggesting coalloying of Fe2P with Co (or Ni) and Si as a strategy for maximizing the magnetocrystalline anisotropy at and above room temperature.

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  • Received 8 August 2017

DOI:https://doi.org/10.1103/PhysRevMaterials.1.051401

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

I. A. Zhuravlev1, V. P. Antropov2, A. Vishina3, M. van Schilfgaarde3, and K. D. Belashchenko1

  • 1Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
  • 2Ames Laboratory, Ames, Iowa 50011, USA
  • 3Kings College London, London WC2R 2LS, United Kingdom

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Issue

Vol. 1, Iss. 5 — October 2017

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