Perpendicular magnetic anisotropy in ultrathin yttrium iron garnet films prepared by pulsed laser deposition technique

Citation
E. Popova et al., Perpendicular magnetic anisotropy in ultrathin yttrium iron garnet films prepared by pulsed laser deposition technique, J VAC SCI A, 19(5), 2001, pp. 2567-2570
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
ISSN journal
0734-2101 → ACNP
Volume
19
Issue
5
Year of publication
2001
Pages
2567 - 2570
Database
ISI
SICI code
0734-2101(200109/10)19:5<2567:PMAIUY>2.0.ZU;2-Q
Abstract
A series of thin and ultrathin (< 500 degrees Angstrom thick) polycrystalli ne yttrium iron garnet (YIG) films has been prepared on quartz substrates b y the pulsed laser deposition technique to study the effects of dimensional changes on the magnetic properties. The film thickness was varied from 100 to 3800 Angstrom. Saturation magnetization decreased rapidly in ultrathin films with decreasing thickness. The lattice cell of all samples was found to be slightly distorted though the elementary cell volume was one of a bul k crystal. The Curie temperature of the films did not differ from the bulk YIG value. Ferromagnetic resonance experiments show evidence of a change fr om in-plane magnetization to a perpendicular magnetization in films thinner than 140 Angstrom. This reorientation can be explained by the magnetoelast ic anisotropy contribution related to thermally induced strain. This contri bution is likely to be the principal origin of the perpendicular anisotropy . (C) 2001 American Vacuum Society.