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Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating

Electrically controllable magnetism, which requires the field-effect manipulation of both charge and spin degrees of freedom, has attracted growing interest since the emergence of spintronics. We report the reversible electrical switching of ferromagnetic (FM) states in platinum (Pt) thin films by i...

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Autores principales: Liang, Lei, Chen, Qihong, Lu, Jianming, Talsma, Wytse, Shan, Juan, Blake, Graeme R., Palstra, Thomas T. M., Ye, Jianting
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5938224/
https://www.ncbi.nlm.nih.gov/pubmed/29740612
http://dx.doi.org/10.1126/sciadv.aar2030
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author Liang, Lei
Chen, Qihong
Lu, Jianming
Talsma, Wytse
Shan, Juan
Blake, Graeme R.
Palstra, Thomas T. M.
Ye, Jianting
author_facet Liang, Lei
Chen, Qihong
Lu, Jianming
Talsma, Wytse
Shan, Juan
Blake, Graeme R.
Palstra, Thomas T. M.
Ye, Jianting
author_sort Liang, Lei
collection PubMed
description Electrically controllable magnetism, which requires the field-effect manipulation of both charge and spin degrees of freedom, has attracted growing interest since the emergence of spintronics. We report the reversible electrical switching of ferromagnetic (FM) states in platinum (Pt) thin films by introducing paramagnetic ionic liquid (PIL) as the gating media. The paramagnetic ionic gating controls the movement of ions with magnetic moments, which induces itinerant ferromagnetism on the surface of Pt films, with large coercivity and perpendicular anisotropy mimicking the ideal two-dimensional Ising-type FM state. The electrical transport of the induced FM state shows Kondo effect at low temperature, suggesting spatially separated coexistence of Kondo scattering beneath the FM interface. The tunable FM state indicates that paramagnetic ionic gating could serve as a versatile method to induce rich transport phenomena combining field effect and magnetism at PIL-gated interfaces.
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spelling pubmed-59382242018-05-08 Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating Liang, Lei Chen, Qihong Lu, Jianming Talsma, Wytse Shan, Juan Blake, Graeme R. Palstra, Thomas T. M. Ye, Jianting Sci Adv Research Articles Electrically controllable magnetism, which requires the field-effect manipulation of both charge and spin degrees of freedom, has attracted growing interest since the emergence of spintronics. We report the reversible electrical switching of ferromagnetic (FM) states in platinum (Pt) thin films by introducing paramagnetic ionic liquid (PIL) as the gating media. The paramagnetic ionic gating controls the movement of ions with magnetic moments, which induces itinerant ferromagnetism on the surface of Pt films, with large coercivity and perpendicular anisotropy mimicking the ideal two-dimensional Ising-type FM state. The electrical transport of the induced FM state shows Kondo effect at low temperature, suggesting spatially separated coexistence of Kondo scattering beneath the FM interface. The tunable FM state indicates that paramagnetic ionic gating could serve as a versatile method to induce rich transport phenomena combining field effect and magnetism at PIL-gated interfaces. American Association for the Advancement of Science 2018-04-06 /pmc/articles/PMC5938224/ /pubmed/29740612 http://dx.doi.org/10.1126/sciadv.aar2030 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Liang, Lei
Chen, Qihong
Lu, Jianming
Talsma, Wytse
Shan, Juan
Blake, Graeme R.
Palstra, Thomas T. M.
Ye, Jianting
Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
title Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
title_full Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
title_fullStr Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
title_full_unstemmed Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
title_short Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
title_sort inducing ferromagnetism and kondo effect in platinum by paramagnetic ionic gating
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5938224/
https://www.ncbi.nlm.nih.gov/pubmed/29740612
http://dx.doi.org/10.1126/sciadv.aar2030
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