KIT | KIT-Bibliothek | Impressum | Datenschutz

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

Ye, Xinglong 1; Singh, Harish K.; Zhang, Hongbin; Geßwein, Holger 2; Chellali, Mohammed Reda 1; Witte, Ralf 1; Molinari, Alan 1; Skokov, Konstantin; Gutfleisch, Oliver; Hahn, Horst 1; Kruk, Robert 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)


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.

Verlagsausgabe §
DOI: 10.5445/IR/1000125340
Veröffentlicht am 27.10.2020
DOI: 10.1038/s41467-020-18552-z
Zitationen: 16
Web of Science
Zitationen: 16
Zitationen: 17
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
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in Nature Communications
Verlag Nature Research
Band 11
Heft 1
Seiten Art.-Nr.: 4849
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 24.09.2020
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page