Growth of M-type hexaferrite thin films with conical magnetic structure

Thin films of the M-type hexaferrite, BaFe10.2Sc1.8O19, have been grown on Al2O3 (00.1) substrates by pulsed laser deposition. Post-deposition annealing improves the structural quality and produces completely relaxed thin films. The post-annealed films show magnetic behavior corresponding to a conic...

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Bibliographic Details
Published in:Applied physics letters 2013-01, Vol.102 (3)
Main Authors: Borisov, P., Alaria, J., Yang, T., McMitchell, S. R. C., Rosseinsky, M. J.
Format: Article
Language:English
Subjects:
Aluminum oxide
Annealing
Magnetic properties
Magnetic structure
Magnetization curves
Phase diagrams
Pulsed laser deposition
Thin films
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Summary:Thin films of the M-type hexaferrite, BaFe10.2Sc1.8O19, have been grown on Al2O3 (00.1) substrates by pulsed laser deposition. Post-deposition annealing improves the structural quality and produces completely relaxed thin films. The post-annealed films show magnetic behavior corresponding to a conical magnetic structure, which is required to establish the magnetoelectric effect in hexaferrites. The magnetic phase diagram has been obtained from hard magnetization curves. Finite-size effects due to the restricted length scale of the magnetic helix explain differences in magnetic properties between thin films and the bulk.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4776223