COERCIVITY OF GAMMA-(FE0.74MN0.15CO0.11)(2)O-3 THIN-FILMS BY DC REACTIVE MAGNETRON SPUTTERING

Authors
CHANG WD CHIN TS
Citation
Wd. Chang et Ts. Chin, COERCIVITY OF GAMMA-(FE0.74MN0.15CO0.11)(2)O-3 THIN-FILMS BY DC REACTIVE MAGNETRON SPUTTERING, Applied surface science, 92, 1996, pp. 475-479
Citations number
14
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
Journal title
Applied surface science → ACNP
ISSN journal
01694332
Volume
92
Year of publication
1996
Pages
475 - 479
Database
ISI
SICI code
0169-4332(1996)92:<475:COGTBD>2.0.ZU;2-L
Abstract
Thin (Fe0.74Mn0.15Co0.11)(3)O-4 films of 2400 Angstrom were deposited in-situ on Si(111) substrate under well controlled O-2 flow rate by dc reactive magnetron sputtering. The coercivity of as-deposited magneti te films is 480-600 Oe. After 360 degrees C, 90 min oxidation process, the films become maghemite gamma-(Fe0.74Mn0.15Co0.11)(2)O-3, and the coercivity is increased by a factor of 4-7 to 2300-3500 Oe. The origin of coercivity increment is attributed to magneto-anisotropy arisen fr om interfacial stress of films and directional order brought by Co and Mn. The magnetostriction of a gamma-(Fe0.74Mn0.15Co0.11)(2)O-3 thin f ilm is calculated to be - 12 x 10(-6).