Magnetic properties of the rare-earth intermetallics RGa/sub 2/
Journal Article
·
· J. Appl. Phys.; (United States)
The magnetic susceptibility (chi) of polycrystalline samples of RGa/sub 2/, R=Ce, Pr, Nd, Gd, Tb, Dy, Ho, and Er, has been measured at low field, from 1.5 K to 300 K. The magnetization of these samples also has been measured up to 80 kOe at low temperatures. Antiferromagnetic behavior was observed for all the samples with Neel temperatures (T/sub N/) ranging from about 4.1 K for CeGa/sub 2/ to about 14.8 K for TbGa/sub 2/. Curie-Weiss fits to the high-temperature chi (T) data led to effective moments in good agreement with those expected for R/sup 3 +/ ions. The paramagnetic Weiss temperatures cannot be reconciled with the de Gennes theory based on free electron coupling of the R spins via the RKKY interaction. Electrical resistivity of selected polycrystalline samples has been measured, and the effects of spin-disorder scattering observed below T/sub N/. CeGa/sub 2/ shows no evidence of Kondo behavior. Magnetization measurements for the polycrystalline samples show metamagnetic phase transitions when the antiferromagnetic R-R interactions are overcome. Measurements on a HoGa/sub 2/ single crystal show that the (100) direction is the easy direction.
- Research Organization:
- Behlen Laboratory of Physics, University of Nebraska, Lincoln, Nebraska 68588
- OSTI ID:
- 5122961
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:3; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
ANTIFERROMAGNETISM
BINARY ALLOY SYSTEMS
CERIUM ALLOYS
CRYSTALS
DYSPROSIUM ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ERBIUM ALLOYS
GADOLINIUM ALLOYS
GALLIUM ALLOYS
GALLIUM BASE ALLOYS
HOLMIUM ALLOYS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
NEEL TEMPERATURE
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
POLYCRYSTALS
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
TERBIUM ALLOYS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
ANTIFERROMAGNETISM
BINARY ALLOY SYSTEMS
CERIUM ALLOYS
CRYSTALS
DYSPROSIUM ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ERBIUM ALLOYS
GADOLINIUM ALLOYS
GALLIUM ALLOYS
GALLIUM BASE ALLOYS
HOLMIUM ALLOYS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
NEEL TEMPERATURE
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
POLYCRYSTALS
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
TERBIUM ALLOYS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE