Realization of Far From Equilibrium Cation Distributions in Ferrites

The deposition and characterization of high quality ferrite thin films by the alternating target laser ablation deposition (ATLAD) technique is discussed with the emphasis on the unique magnetic properties induced in these materials by stabilizing far from equilibrium cation distributions. Two spine...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2009-02, Vol.45 (2), p.666-669
Main Authors: Geiler, A.L., Yang, A., Xu Zuo, Soack Dae Yoon, Yajie Chen, Harris, V.G., Vittoria, C.
Format: Article
Language:English
Subjects:
Applied sciences
Barium compounds
Cation distribution
Cations
Cross-disciplinary physics: materials science
rheology
Deposition
Exact sciences and technology
EXAFS
Ferrite films
Ferrites
hexagonal ferrite
Laser ablation
Laser stability
Magnetic films
Magnetic materials
Magnetic properties
Magnetism
Manganese
Materials science
Metals. Metallurgy
Optical materials
Other topics in materials science
Physics
Production techniques
pulsed laser deposition
Saturation (magnetic)
Saturation magnetization
Spinel
spinel ferrite
Surface treatment
Temperature
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Summary:The deposition and characterization of high quality ferrite thin films by the alternating target laser ablation deposition (ATLAD) technique is discussed with the emphasis on the unique magnetic properties induced in these materials by stabilizing far from equilibrium cation distributions. Two spinel systems and three hexagonal ferrite systems are studied. In the case of manganese spinel ferrite a large in-plane uniaxial anisotropy field ( > 5 kOe) is induced in ATLAD deposited films. In the case of copper spinel ferrite a 65% enhancement in the saturation magnetization is observed over the bulk value. In the case of manganese substituted barium ferrite a 12-22% enhancement in low temperature saturation magnetization and 40-60 K increase in the Neel temperature is observed. The unique magnetic properties of the films are correlated with the cation distributions stabilized by the application of the ATLAD technique as determined by the extended X-ray absorption fine structure (EXAFS) analysis.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2008.2010468