Morin transition temperature in (0001)-oriented α-Fe{sub 2}O{sub 3} thin film and effect of Ir doping

Journal Article · Thu May 07 04:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4916304· OSTI ID:22410035

Shimomura, Naoki; Pati, Satya Prakash; Sato, Yuji; Nozaki, Tomohiro; Sahashi, Masashi ^[1]; Shibata, Tatsuo ^[2]; Mibu, Ko ^[3]

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1. Department of Electronic Engineering, Graduate School of Electronic Engineering, Tohoku University, Sendai 980-8579 (Japan)
2. Advanced Technology Development Center, TDK Corporation, Ichikawa 272-0026 (Japan)
3. Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan)

The structural properties and Morin transition in c-plane-oriented α-Fe{sub 2}O{sub 3} and Ir-doped α-Fe{sub 2}O{sub 3} thin films have been investigated. The enhancement of the Morin transition temperature (T{sub M}) in α-Fe{sub 2}O{sub 3} film by Ir doping has been demonstrated. The T{sub M} in the c-plane-oriented α-Fe{sub 2}O{sub 3} thin film was determined from the temperature-dependent in-plane magnetization and change of coercivity (H{sub c}); this T{sub M} value was found close to that of bulk α-Fe{sub 2}O{sub 3}. The spin directions of non-doped and Ir-doped α-Fe{sub 2}O{sub 3} at room temperature were also estimated from conversion electron Mössbauer spectroscopy measurements. We confirmed that Ir doping dramatically enhances the T{sub M} of α-Fe{sub 2}O{sub 3} thin film.

• OSTI ID: 22410035
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 117; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
COERCIVE FORCE
DOPED MATERIALS
ELECTRONS
FERRITES
IRIDIUM COMPOUNDS
IRON OXIDES
MAGNETIZATION
MOESSBAUER EFFECT
SPIN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TRANSITION TEMPERATURE