Interface Double-Exchange Ferromagnetism in the Mn-Zn-O System: New Class of Biphase Magnetism
- 3 June 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (21), 217206
- https://doi.org/10.1103/physrevlett.94.217206
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 and via a double-exchange mechanism. The presence of the ZnO around modifies the kinetics of 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.
Keywords
This publication has 11 references indexed in Scilit:
- Nanostructure and magnetic properties of the MnZnO system, a room temperature magnetic semiconductor?Nanotechnology, 2005
- Absence of ferromagnetism in Co and Mn substituted polycrystalline ZnOPhysical Review B, 2005
- Absence of ferromagnetism in Mn- and Co-doped ZnOJournal of Materials Chemistry, 2004
- On the origin of high-temperature ferromagnetism in the low-temperature-processed Mn–Zn–O systemNature Materials, 2004
- Ferromagnetism above room temperature in bulk and transparent thin films of Mn-doped ZnONature Materials, 2003
- Role of calcium ions as doped-hole attractors in destabilizing charge-ordered states in Mn perovskitesPhysical Review B, 2001
- The physics of manganites: Structure and transportReviews of Modern Physics, 2001
- Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic SemiconductorsScience, 2000
- High-pressure phase transition and properties of spinelPhysical Review B, 1999
- Thermal stability and structural transition of metastable Mn5O8: in situ micro-Raman studySolid State Communications, 1999