Unusual anisotropic magnetoresistance due to magnetization-dependent spin-orbit interactions
arXiv:2301.07886 · doi:10.1103/PhysRevB.108.L020401
Abstract
One of recent surprising discoveries is the unusual anisotropic magnetoresistance (UAMR) that depends on two magnetization components perpendicular to the current differently, in contrast to the conventional anisotropic magnetoresistance (AMR) that predicts no change in resistance when the magnetization varies in the plane perpendicular to the current. Using density functional theory and Boltzmann transport equation calculations for bcc Fe, hcp Co, and bcc FeCo alloys, we show that UAMR can be accounted by the magnetization-dependent spin-orbit interactions (SOI): Magnetization-dependent SOI modifies electron energy bands that, in turn, changes resistance. A phenomenological model reveals the intrinsic connection between SOI and order-parameters. Such a mechanism is confirmed by the strong biaxial stain effect on UAMR. Our findings provide an efficient way of searching and optimizing materials with large UAMR, important in the design of high-performance spintronic devices.
arXiv comment4 figures
References in corpus (15)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Advanced capabilities for materials modelling with Quantum ESPRESSO
- Maximally-localized generalized Wannier functions for composite energy bands
- Anomalous Hall effect
- Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
- Maximally localized Wannier functions: Theory and applications
- Wannier90 as a community code: new features and applications
- BoltzWann: A code for the evaluation of thermoelectric and electronic transport properties with a maximally-localized Wannier functions basis
- Anisotropic Magnetoresistance Effects in Fe, Co, Ni, Fe_4N, and Half-Metallic Ferromagnet: A Systematic Analysis
- Intrinsic mechanism for anisotropic magnetoresistance and experimental confirmation in CoFe single-crystal films
- Lithographically and electrically controlled strain effects on anisotropic magnetoresistance in (Ga,Mn)As
- Broadband terahertz probes of anisotropic magnetoresistance disentangle extrinsic and intrinsic contributions
- New Galvanomagnetic Effects of Polycrystalline Magnetic Films
- A theory for anisotropic magnetoresistance in materials with two vector order parameters
- Anisotropic magneto-thermal transport in CoMnGa thin films