Observation of the In-plane Anomalous Hall Effect induced by Octupole in Magnetization Space
arXiv:2402.15741 · doi:10.1088/0256-307X/43/6/060704
Abstract
The Anomalous Hall Effect (AHE) manifests as a transverse voltage proportional to magnetization in ferromagnetic materials under the application of a charge current, being an indispensable tool for probing magnetism, especially in nanoscale devices. However, the AHE primarily sensitizes to out-of-plane magnetization, thereby hindering its capacity to discern the in-plane magnetization, a characteristic prevalent in ferromagnetic films. Here we challenge this conventional understanding by demonstrating the in-plane magnetization-induced AHE in iron and nickel, two ubiquitous ferromagnets. This observation of the in-plane AHE is remarkable as it contradicts existing theories that forbid such phenomena in cubic crystal systems. We trace the origin of this unanticipated phenomenon to a hitherto unconsidered octupole of the anomalous Hall conductivity in the magnetization space, a mechanism we propose could enable the detection of in-plane AHE in a wide range of ferromagnetic materials. This work realizes the in-plane AHE in common ferromagnets by exploiting the anomalous Hall conductivity octupole, revealing a new physical origin of the AHE and promising to revolutionize the design of magnetic devices and sensors.
References in corpus (14)
- First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
- Linear magnetization dependence of the intrinsic anomalous Hall effect
- Spin-group symmetry in magnetic materials with negligible spin-orbit coupling
- Angle-dependent magnetotransport in cubic and tetragonal ferromagnets: Application to (001)- and (113)A-oriented (Ga,Mn)As
- Orbital Magneto-Nonlinear Anomalous Hall Effect in Kagome Magnet FeSn
- Anomalous Hall Effect in Layered Ferrimagnet MnSb2Te4
- In-Plane Magnetization Induced Quantum Anomalous Hall Effect in Atomic Crystals of Group-V Elements
- Unconventional anomalous Hall effect from magnetization parallel to the electric field
- Anisotropic intrinsic anomalous Hall effect in ordered 3dPt alloys
- Large Rashba unidirectional magnetoresistance in the Fe/Ge(111) interface states
- Anisotropic galvanomagnetic effects in single-crystal Fe(001) films elucidated by a phenomenological theory
- Spontaneous in-plane anomalous Hall response observed in a ferromagnetic oxide
- Highly Tunable Perpendicular Magnetic Anisotropy and Anisotropic Magnetoresistance in Ru-doped La0.67Sr0.33MnO3 Epitaxial Films
- Higher-order Hall response arises from octupole order and scalar spin chirality in a noncollinear antiferromagnet