Random magnetic anisotropy effects in glasses based on Gd/sub 65/Co/sub 35/

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Appl. Phys. Commun.; (United States)

OSTI ID:6657339

Othman, F; Lee, K W; O'Shea, M J

The authors report ac susceptibility and magnetization studies of amorphous Gd/sub x/RE/sub 65-x/Co/sub 35/ (65 > x > 35) splat-cooled alloys where RE represents the anisotropic rare-earths Ce, Pr, Nd, Dy, Tb, Er. With decreasing x magnetic anisotropy is introduced into Gd/sub 65/Co/sub 35/ in a controlled fashion. X-rays show the samples to be amorphous. In all of the systems studied except Er the effect of the rare-earth was to transform the single ferromagnetic transition of Gd/sub 65/Co/sub 35/ to a spin-glass-like or speromagnetic transition. The authors have studied the non-linear susceptibility above the ordering temperature and a scaling analysis yields an approximate collapse of the isotherms with beta and delta values of 1.3 +/- 0.1 and 5.0 +/- 0.4 respectively in the Tb system with x=10,30. These values are close to those of dilute crystalline Cu-Mn alloys. The Er system shows qualitatively different behavior with two transitions occurring. These results including possible explanations for the double transition behavior in the Er system is discussed.

• Research Organization: Kansas State Univ., Manhattan
• OSTI ID: 6657339
• Report Number(s): CONF-8511278-
• Journal Information: Appl. Phys. Commun.; (United States), Journal Name: Appl. Phys. Commun.; (United States) Vol. 6:1; ISSN APCOD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALTERNATING CURRENT
CERIUM ALLOYS
COBALT ALLOYS
COHERENT SCATTERING
CURRENTS
DIFFRACTION
DYSPROSIUM ALLOYS
ELECTRIC CURRENTS
ERBIUM ALLOYS
GADOLINIUM ALLOYS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
METALLIC GLASSES
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
SCATTERING
TERBIUM ALLOYS
X-RAY DIFFRACTION