Magnetization and magnetic anisotropy in evaporated GdCo amorphous films

Journal Article · Fri Oct 01 04:00:00 EDT 1976 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.322397· OSTI ID:7176512

Taylor, R C; Gangulee, A

Saturation magnetizations and magnetic anisotropy constants were determined for a series of amorphous GdCo films prepared by thermal evaporation. The films covered the composition range from Gd/sub 0.05/Co/sub 0.95/ to Gd/sub 0.40/Co/sub 0.60/ and were studied by means of ferromagnetic resonance and a force balance magnetometer. The films, in contrast to those prepared by sputtering, had a hard perpendicular direction of magnetization when Co was less than 91 at.%, and easy and moderate directions within the plane of the film. The anisotropy constant can be expressed in terms of sublattice magnetizations by K/sub u/=0.660M/sub Co//sup 2/ +2.218M/sub Co/M/sub Gd/+0.097M/sub Gd//sup 2/. The results are explained based on a pair-ordering mechanism. The composition and temperature dependence of saturation magnetization is essentially the same in evaporated and sputtered films. (AIP)

• Research Organization: IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598
• OSTI ID: 7176512
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 47:10; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
ANISOTROPY
CHEMICAL COMPOSITION
COBALT ALLOYS
FILMS
GADOLINIUM ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
TEMPERATURE DEPENDENCE