In-plane magnetic field control of anomalous Hall response enabled by magnetic anisotropy engineering

Abstract

Engineering magnetic anisotropy provides a powerful route to control magnetization orientation and unlock emerging functionalities in opto-spintronic and current-driven devices. Beyond its role in magnetization reversal, the effective anisotropy can strongly influence the magnetotransport response, offering an additional degree of freedom to tune new device functionalities. In this work, we report a magnetotransport study of a ferrimagnetic [Tb/Co]_{× 5} multilayer grown with a Tb thickness gradient, whose wedge-shaped tilts the uniaxial anisotropy axis slightly away from the film normal. Anomalous Hall resistivity measurements from 80 K to 300 K reveal a spin reorientation transition, while the angular dependence of the magnetotransport responses exposes the crucial role of the tilted anisotropy. A simplified macrospin model reproduces the full angular response across the transition and shows that the observed anomalous Hall effect when the in-plane magnetic field is applied originates from the tilt of the uniaxial anisotropy axis, which supplies a built-in symmetry-breaking mechanism, enabling in-plane field control over the out-of-plane anomalous Hall response, sign included. These findings establish tilted magnetic anisotropy as a promising route toward Hall effect-based sensor applications and highlight Tb/Co multilayers as a versatile platform for anisotropy-engineered spintronic devices.

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Cite

BibTeX RIS

BibTeX

@misc{rodriguez2026inplane,
  title = {{In-plane magnetic field control of anomalous Hall response enabled by magnetic anisotropy engineering}},
  author = {J. C. Rodriguez E. and E. De Biasi and J. I. Facio and D. Salomoni and S. Auffret and R. C. Sousa and I. L. Prejbeanu and A. Bruchhausen and J. Curiale and L. Avilés-Félix},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.11017},
  eprint = {2609.11017},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.11017},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - In-plane magnetic field control of anomalous Hall response enabled by magnetic anisotropy engineering
AU  - J. C. Rodriguez E.
AU  - E. De Biasi
AU  - J. I. Facio
AU  - D. Salomoni
AU  - S. Auffret
AU  - R. C. Sousa
AU  - I. L. Prejbeanu
AU  - A. Bruchhausen
AU  - J. Curiale
AU  - L. Avilés-Félix
PY  - 2026
DA  - 2026/09/10
PB  - arXiv
DO  - 10.48550/arxiv.2609.11017
UR  - https://arxiv.org/abs/2609.11017
AB  - Engineering magnetic anisotropy provides a powerful route to control magnetization orientation and unlock emerging functionalities in opto-spintronic and current-driven devices. Beyond its role in magnetization reversal, the effective anisotropy can strongly influence the magnetotransport response, offering an additional degree of freedom to tune new device functionalities. In this work, we report a magnetotransport study of a ferrimagnetic [Tb/Co]_× 5 multilayer grown with a Tb thickness gradient, whose wedge-shaped tilts the uniaxial anisotropy axis slightly away from the film normal. Anomalous Hall resistivity measurements from 80 K to 300 K reveal a spin reorientation transition, while the angular dependence of the magnetotransport responses exposes the crucial role of the tilted anisotropy. A simplified macrospin model reproduces the full angular response across the transition and shows that the observed anomalous Hall effect when the in-plane magnetic field is applied originates from the tilt of the uniaxial anisotropy axis, which supplies a built-in symmetry-breaking mechanism, enabling in-plane field control over the out-of-plane anomalous Hall response, sign included. These findings establish tilted magnetic anisotropy as a promising route toward Hall effect-based sensor applications and highlight Tb/Co multilayers as a versatile platform for anisotropy-engineered spintronic devices.
ER  -

Abstract

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