Published in

American Physical Society, Physical Review Letters, 21(94)

DOI: 10.1103/physrevlett.94.217206

Links

Tools

Export citation

Search in Google Scholar

Interface Double-Exchange Ferromagnetism in the Mn-Zn-O System: New Class of Biphase Magnetism

Journal article published in 2005 by M. A. García, Garcia Ma, Mar\á Luisa Ruiz González ORCID, Adrián Quesada, José Luis Costa Krämer, Jf F. Fernández ORCID, Sj J. Khatib, Caballero Ac, A. Wennberg, M. S. Martín González ORCID, Ac C. Caballero, F. Briones, Marina Villegas, J. M. González Calbet ORCID, A. Hernando ORCID
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

In this Letter, we experimentally show that the room temperature ferromagnetism in the Mn-Zn-O system recently observed is associated with the coexistence of Mn(3+) and Mn(4+) via a double-exchange mechanism. The presence of the ZnO around MnO(2) modifies the kinetics of MnO(2)-->Mn(2)O(3) reduction and favors the coexistence of both Mn oxidation states. The ferromagnetic phase is associated with the interface formed at the Zn diffusion front into Mn oxide, corroborated by preparing thin film multilayers that exhibit saturation magnetization 2 orders of magnitude higher than bulk samples.