Simple theory for the dependence of the electrical resistance of the magnetic superconductors TmRh/sub 4/B/sub 4/ and ErRh/sub 4/B/sub 4/ on temperature and field

Journal Article · Tue Apr 01 00:00:00 EST 1986 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00682065· OSTI ID:5728818

Meijer, H C; Andriessen, J; Postma, H

A phenomenological description for the temperature and magnetic field dependence of the electrical resistance R of polycrystalline samples of the reentrant superconductors TmRh/sub 4/B/sub 4/ and ErRh/sub 4/B/sub 4/ is given on the basis of two assumptions: (1) Due to the anisotropic values of the rare-earth ions the critical field of the crystallites depends on the direction of the externally applied field, which leads to an increasing number of normal crystallites with increasing field. For the dependence of the magnetization M on temperature, a molecular field model is used. (2) The bulk resistance R of the sample depends in a linear way on the fraction of normal crystallites. There is a qualitative agreement with the experimental results of Hamaker et al. and of Ott et al. It is also shown that an applied field H/sub e/ is equal to the orbital critical field H(/sub c//sub 2/ for the temperature at which R(H/sub e/, T) starts deviating from the resistance of the normal sample.

• Research Organization: Department of Applied Physics, Delft University of Technology, Delft, The Netherlands
• OSTI ID: 5728818
• Journal Information: J. Low Temp. Phys.; (United States), Vol. 63:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ERBIUM BORIDES
CRITICAL FIELD
MAGNETORESISTANCE
RHODIUM BORIDES
THULIUM BORIDES
ANISOTROPY
ELECTRIC CONDUCTIVITY
MAGNETIC FIELDS
MAGNETIZATION
POLYCRYSTALS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
BORIDES
BORON COMPOUNDS
CRYSTALS
ELECTRICAL PROPERTIES
ERBIUM COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM COMPOUNDS
THULIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360104* - Metals & Alloys- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)