Frequency dependence of microwave magnetic resonance in the spin glass Gd/sub 37/Al/sub 63/

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.21.29· OSTI ID:5747413

Malozemoff, A P; Hart, S C

Further data, completing an earlier report, are presented on the frequency and temperature dependence of the microwave magnetic resonance of an amorphous Gd/sub 37/Al/sub 63/ film, which shows spin-glass properties. The data are analyzed according to a recent exchange-narrowing model in the temperature range above the freezing temperature. The g shift is found to be frequency independent in this range, in support of the model. An anisotropy field of order 0.3(4..pi..M) is also found in this range. Below the freezing temperature the frequency dependence reveals a changeover to a different kind of behavior, better described by a local field than by a g shift.

• Research Organization: IBM Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
• OSTI ID: 5747413
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Vol. 21:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
MAGNETIC RESONANCE
GADOLINIUM ALLOYS
AMORPHOUS STATE
FREQUENCY DEPENDENCE
MAGNETIC PROPERTIES
MICROWAVE SPECTRA
SPIN EXCHANGE
TEMPERATURE DEPENDENCE
ALLOYS
ALUMINIUM ALLOYS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RESONANCE
SPECTRA
360104* - Metals & Alloys- Physical Properties