Tunable dimensional crossover and magnetocrystalline anisotropy in FeP-based alloys
arXiv:1708.01683 · doi:10.1103/PhysRevMaterials.1.051401
Abstract
Electronic structure calculations are used to examine the magnetic properties of FeP-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 FeP 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 of 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 FeP. These findings enable the optimization of the alloy content, suggesting co-alloying of FeP with Co (or Ni) and Si as a strategy for maximizing the magnetocrystalline anisotropy at and above room temperature.
arXiv comment5 pages, 7 figures, revised and corrected
References in corpus (7)
- Temperature dependent magnetic anisotropy in metallic magnets from an ab-initio electronic structure theory: L1_0-ordered FePt
- Constituents of magnetic anisotropy and a screening of spin-orbit coupling in solids
- Effects of alloying and strain on the magnetic properties of FeN
- Origin of the spin reorientation transitions in (FeCo)B alloys
- Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets
- Thermodynamics of layered Heisenberg magnets with arbitrary spin
- On the large magnetic anisotropy of Fe_{2}P