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Ferromagnetism of UFe2 and Comparison with the Ferromagnetic Theories

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.1729516· OSTI ID:4646736
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The intermetallic compound UFe/sub 2/ is ferromagnetic. A considerable number of magnetization isotherms were obtained from 200 down to 4.2 deg K with applied field up to 14,000 Oe. The Curie temperature was determined to be 172 deg K and the Bohr magneton number 1.02 per UFe/sub 2/ molecule. Several hysteresis loops at different temperatures were obtained. The coercive force, the remanence, and the loop area are all very small. These data were compared with existing theories of ferromagnetism. The sigma /sub OT/ sigma /sub OO/T/T/ sub c/ curve deviates considerably from the molecular field for curve J = 1/2. The experimental data fit the T/sup 32/ law better than the T/sup 2/ law. Dyson's formula is valid below T/T/sub c/ = 0.52 while Bloch's formula is valid below T/T/sub c/ = 0.35.
Research Organization:
Massachusetts Inst. of Tech., Cambridge
Sponsoring Organization:
USDOE
NSA Number:
NSA-17-037715
OSTI ID:
4646736
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 34; ISSN JAPIAU; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

BLOCH WALL
CURIE POINT
FERROMAGNETIC MATERIALS
HYSTERESIS
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETISM
MEASURED VALUES
MOLECULES
PHYSICS
SPIN
TEMPERATURE
TRANSIENTS
URANIUM ALLOYS
ZONES