Magnetic field dependence of resistivity minima in amorphous La--Gd--Au alloys with high Gd content. [(La/sub 100-x/Gd/sub x/)/sub 80/Au/sub 20/, x = 8 to 40]
Magnetoresistivity measurements are performed in fields up to 40 kOe on some concentrated amorphous La--Gd--Au alloys exhibiting characteristics of a spin-glass. The negative magnetoresistivity at low temperature is found to be roughly proportional to the square of the magnetization. The resistivity minima in these alloys are attributed to a mechanism of electron scattering from magnetic clouds coupled by the RKKY interactions, in qualitative agreement with analysis of remanent magnetization data. 4 figures, 1 table.
- Research Organization:
- California Inst. of Tech., Pasadena (USA). W.M. Keck Lab. of Engineering Materials
- OSTI ID:
- 7107965
- Report Number(s):
- CALT-822-93
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
AMORPHOUS STATE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GADOLINIUM ALLOYS
GOLD ALLOYS
LANTHANUM ALLOYS
LANTHANUM BASE ALLOYS
MAGNETIC FIELDS
MAGNETIZATION
MAGNETORESISTANCE
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
TERNARY ALLOY SYSTEMS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
AMORPHOUS STATE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GADOLINIUM ALLOYS
GOLD ALLOYS
LANTHANUM ALLOYS
LANTHANUM BASE ALLOYS
MAGNETIC FIELDS
MAGNETIZATION
MAGNETORESISTANCE
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
TERNARY ALLOY SYSTEMS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE