Published February 9, 2015 | Version v1
Journal article Metadata-only

Room temperature ferromagnetism in conducting α-(In1−xFex)2O3 alloy films

Creators

  • 1. Department of Electronic Science and Engineering, Kyoto University, 6158520 Kyoto (Japan)
  • 2. Photonics and Electronics Science and Engineering Center, Kyoto University, 6158520 Kyoto (Japan)
  • 3. Groupe d'Etudes de la Matière Condensée (GEMaC), Université de Versailles St Quentin en Yvelines - CNRS, 78035 Versailles (France)

Description

We have studied electronic transport and magnetic properties of α-(In1−xFex)2O3 alloy films. Temperature dependence of resistivity of the films showed semiconducting behavior of conductivity. Room temperature ferromagnetism was observed. Relatively high coercive fields indicated that observed ferromagnetism in α-(In1−xFex)2O3 films were not arisen from magnetic metallic iron nano-precipitates. Remanence measurement revealed the Curie temperature of 520 K and 620 K for α-(In0.52Fe0.48)2O3 and α-(In0.23Fe0.77)2O3 films, corresponding to a weakening of superexchange interactions in these alloys (with less magnetic iron cations) with respect to canted antiferromagnet α-Fe2O3. Nevertheless, Curie temperatures remain much higher than 300 K, and semiconducting behavior with low activation energy in resistivity for middle composition alloy, exhibiting combined multi-functionality of room ferromagnetism and semiconducting properties, in corundum alloys such as α-(Ga1−xFex)2O3 or α-Fe2−xTixO3

Additional details

Identifiers

DOI
10.1063/1.4908050;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
106
Journal Issue
6
Journal Page Range
p. 062405-062405.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46118478
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ACTIVATION ENERGY; ANTIFERROMAGNETISM; CATIONS; COERCIVE FORCE; CONCENTRATION RATIO; CORUNDUM; CURIE POINT; FERRITES; FERROMAGNETISM; FILMS; INDIUM COMPOUNDS; MAGNETIC PROPERTIES; PRECIPITATION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K
Descriptors DEC
CHARGED PARTICLES; DIMENSIONLESS NUMBERS; ENERGY; FERRIMAGNETIC MATERIALS; IONS; IRON COMPOUNDS; MAGNETIC MATERIALS; MAGNETISM; MATERIALS; MINERALS; OXIDE MINERALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SEPARATION PROCESSES; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE

Optional Information

Notes
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