Published November 18, 2013
| Version v1
Journal article
High spin polarization at room temperature in Ge-substituted Fe3O4 epitaxial thin film grown under high oxygen pressure
Creators
- 1. Department of Electrical Engineering and Information Systems, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)
Description
Epitaxial thin films of room-temperature ferrimagnetic (Fe,Ge)3O4 were fabricated using pulsed laser deposition. Films with a single-phase spinel structure were grown under high oxygen pressures (0.01–0.6 Pa). The carrier transport across (Fe,Ge)3O4/Nb:SrTiO3 interface was studied to estimate the spin polarization of (Fe, Ge)3O4. Current–voltage curves of Fe2.8Ge0.2O4/Nb:SrTiO3 junction showed rectifying behavior even at 300 K whereas Fe3O4/Nb:SrTiO3 junction showed ohmic behavior. Calculations based on a model for a Schottky contact with a ferromagnetic component yielded a spin polarization of 0.50 at 300 K for Fe2.8Ge0.2O4, indicating its potential as a promising spin injector
Additional details
Identifiers
- DOI
- 10.1063/1.4832062;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 103
- Journal Issue
- 21
- Journal Page Range
- p. 212404-212404.4
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 45075193
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ENERGY BEAM DEPOSITION; FERRITES; INTERFACES; IRON OXIDES; OXYGEN; PULSED IRRADIATION; SEMICONDUCTOR JUNCTIONS; SPIN ORIENTATION; STRONTIUM TITANATES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; DEPOSITION; ELEMENTS; FERRIMAGNETIC MATERIALS; FILMS; IRON COMPOUNDS; IRRADIATION; MAGNETIC MATERIALS; MATERIALS; NONMETALS; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; STRONTIUM COMPOUNDS; SURFACE COATING; TEMPERATURE RANGE; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2013 AIP Publishing LLC