Effect of a magnetic field on the electrical resistance of europium near the Neel point

Journal Article · Mon Mar 01 04:00:00 EST 1976 · Sov. Phys. - Solid State (Engl. Transl.); (United States)

OSTI ID:7359076

Boyarskii, L A; Dikovskii, V Y; Podgornykh, S M

The electrical resistance of a polycrystalline europium sample with the resistance ratio R (300..cap alpha../sup 0/K)/R (4.2/sup 0/K) approx. =150 was measured by a potentiometric method over the temperature range 77--90/sup 0/K in magnetic fields up to 20 kOe. It was found that the magnetic field displaced the Neel point to lower temperatures. On the other hand, the nature of the anomaly was independent of the field (within the experimental error) and the value of the critical exponent was always close to -0.33. The magnetoresistance was negative in the critical region and tended to zero at the transition temperature. The observed hysteresis effects support the proposition that the main mechanism of the negative magnetoresistance is the change in the antiferromagnetic domain structure of europium. (AIP)

• Research Organization: Institute of Inorganic Chemistry, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk
• OSTI ID: 7359076
• Journal Information: Sov. Phys. - Solid State (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Solid State (Engl. Transl.); (United States) Vol. 18:3; ISSN SPSSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EUROPIUM
GALVANOMAGNETIC EFFECT
LOW TEMPERATURE
MAGNETIC FIELDS
METALS
NEEL TEMPERATURE
PHYSICAL PROPERTIES
RARE EARTHS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE