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Giant voltage-induced modification of magnetism in micron-scale ferromagnetic metals by hydrogen charging

Ye, Xinglong; Singh, Harish K.; Zhang, Hongbin; Geßwein, Holger; Chellali, Mohammed Reda; Witte, Ralf; Molinari, Alan; Skokov, Konstantin; Gutfleisch, Oliver; Hahn, Horst; Kruk, Robert

Abstract:
Owing to electric-field screening, the modification of magnetic properties in ferromagnetic metals by applying small voltages is restricted to a few atomic layers at the surface of metals. Bulk metallic systems usually do not exhibit any magneto-electric effect. Here, we report that the magnetic properties of micron-scale ferromagnetic metals can be modulated substantially through electrochemically-controlled insertion and extraction of hydrogen atoms in metal structure. By applying voltages of only ~ 1 V, we show that the coercivity of micrometer-sized SmCo5, as a bulk model material, can be reversibly adjusted by ~ 1 T, two orders of magnitudes larger than previously reported. Moreover, voltage-assisted magnetization reversal is demonstrated at room temperature. Our study opens up a way to control the magnetic properties in ferromagnetic metals beyond the electric-field screening length, paving its way towards practical use in magneto-electric actuation and voltage-assisted magnetic storage.

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Verlagsausgabe §
DOI: 10.5445/IR/1000125340
Veröffentlicht am 27.10.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000125340
Erschienen in Nature Communications
Band 11
Heft 1
Seiten Art.-Nr.: 4849
Vorab online veröffentlicht am 24.09.2020
Nachgewiesen in Scopus
Web of Science
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