RT Journal Article
T1 Interfaceless exchange bias in CoFe2O4 nanocrystals
A1 Rivas Murias, Beatriz
A1 Testa Anta, Martín
A1 Skorikov, Alexander S.
A1 Comesaña Hermo, Miguel
A1 Bals, Sara
A1 Salgueiriño Maceira, Verónica
K1 2202.08 Magnetismo
AB Oxidized cobalt ferrite nanocrystals with a modified distribution of the magnetic cations in their spinel structure give place to an unusual exchange-coupled system with a double reversal of the magnetization, exchange bias and increased coercivity, but without the presence of a clear physical interface that delimits two well-differentiated magnetic phases. More specifically, the partial oxidation of cobalt cations and the formation of Fe vacancies at the surface region entail the formation of a cobalt-rich mixed ferrite spinel which is strongly pinned by the ferrimagnetic background from the cobalt ferrite lattice. This particular configuration of exchange-biased magnetic behavior, involving two different magnetic phases but without the occurrence of a crystallographically coherent interface, revolutionizes the established concept of the exchange bias phenomenology.
PB Nano Letters
SN 15306984
YR 2023
FD 2023-02-27
LK http://hdl.handle.net/11093/6021
UL http://hdl.handle.net/11093/6021
LA eng
NO Nano Letters, 23(5): 1688-1695 (2023)
NO Agencia Estatal de Investigación | Ref. FJC2021-046680-I
DS Investigo
RD 04-dic-2024