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Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy

Their high tunability of electronic and magnetic properties makes transition‐metal oxides (TMOs) highly intriguing for fundamental studies and promising for a wide range of applications. TMOs with strong ferrimagnetism provide new platforms for tailoring the anomalous Hall effect (AHE) beyond conven...

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Autores principales: Lv, Hua, Huang, Xiao Chun, Zhang, Kelvin Hong Liang, Bierwagen, Oliver, Ramsteiner, Manfred
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10558668/
https://www.ncbi.nlm.nih.gov/pubmed/37530205
http://dx.doi.org/10.1002/advs.202302956
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author Lv, Hua
Huang, Xiao Chun
Zhang, Kelvin Hong Liang
Bierwagen, Oliver
Ramsteiner, Manfred
author_facet Lv, Hua
Huang, Xiao Chun
Zhang, Kelvin Hong Liang
Bierwagen, Oliver
Ramsteiner, Manfred
author_sort Lv, Hua
collection PubMed
description Their high tunability of electronic and magnetic properties makes transition‐metal oxides (TMOs) highly intriguing for fundamental studies and promising for a wide range of applications. TMOs with strong ferrimagnetism provide new platforms for tailoring the anomalous Hall effect (AHE) beyond conventional concepts based on ferromagnets, and particularly TMOs with perpendicular magnetic anisotropy (PMA) are of prime importance for today's spintronics. This study reports on transport phenomena and magnetic characteristics of the ferrimagnetic TMO NiCo(2)O(4) (NCO) exhibiting PMA. The entire electrical and magnetic properties of NCO films are strongly correlated with their conductivities governed by the cation valence states. The AHE exhibits an unusual sign reversal resulting from a competition between intrinsic and extrinsic mechanisms depending on the conductivity, which can be tuned by the synthesis conditions independent of the film thickness. Importantly, skew‐scattering is identified as an AHE contribution for the first time in the low‐conductivity regime. Application wise, the robust PMA without thickness limitation constitutes a major advantage compared to conventional PMA materials utilized in today's spintronics. The great potential for applications is exemplified by two proposed novel device designs consisting only of NCO films that open a new route for future spintronics, such as ferrimagnetic high‐density memories.
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spelling pubmed-105586682023-10-08 Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy Lv, Hua Huang, Xiao Chun Zhang, Kelvin Hong Liang Bierwagen, Oliver Ramsteiner, Manfred Adv Sci (Weinh) Research Articles Their high tunability of electronic and magnetic properties makes transition‐metal oxides (TMOs) highly intriguing for fundamental studies and promising for a wide range of applications. TMOs with strong ferrimagnetism provide new platforms for tailoring the anomalous Hall effect (AHE) beyond conventional concepts based on ferromagnets, and particularly TMOs with perpendicular magnetic anisotropy (PMA) are of prime importance for today's spintronics. This study reports on transport phenomena and magnetic characteristics of the ferrimagnetic TMO NiCo(2)O(4) (NCO) exhibiting PMA. The entire electrical and magnetic properties of NCO films are strongly correlated with their conductivities governed by the cation valence states. The AHE exhibits an unusual sign reversal resulting from a competition between intrinsic and extrinsic mechanisms depending on the conductivity, which can be tuned by the synthesis conditions independent of the film thickness. Importantly, skew‐scattering is identified as an AHE contribution for the first time in the low‐conductivity regime. Application wise, the robust PMA without thickness limitation constitutes a major advantage compared to conventional PMA materials utilized in today's spintronics. The great potential for applications is exemplified by two proposed novel device designs consisting only of NCO films that open a new route for future spintronics, such as ferrimagnetic high‐density memories. John Wiley and Sons Inc. 2023-08-02 /pmc/articles/PMC10558668/ /pubmed/37530205 http://dx.doi.org/10.1002/advs.202302956 Text en © 2023 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Lv, Hua
Huang, Xiao Chun
Zhang, Kelvin Hong Liang
Bierwagen, Oliver
Ramsteiner, Manfred
Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy
title Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy
title_full Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy
title_fullStr Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy
title_full_unstemmed Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy
title_short Underlying Mechanisms and Tunability of the Anomalous Hall Effect in NiCo(2)O(4) Films with Robust Perpendicular Magnetic Anisotropy
title_sort underlying mechanisms and tunability of the anomalous hall effect in nico(2)o(4) films with robust perpendicular magnetic anisotropy
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10558668/
https://www.ncbi.nlm.nih.gov/pubmed/37530205
http://dx.doi.org/10.1002/advs.202302956
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