Transport properties of antiferromagnetic superconductors

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00121983· OSTI ID:5201338

Chi, Hongguang; Nagi, A D.S. ^[1]

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1. Univ. of Waterloo, Ontario (Canada)

Transport properties of antiferromagnetic superconductors with T{sub N} < {Tc} were investigated. Detailed numerical, results are given for SmRh{sub 4}B{sub 4} by using the following model. The paramagnetic phase (T{sub N} < T < {Tc}) is described by using Abrikosov-Gorkov theory of magnetic ions in an ordinary superconductor. In the AF phase (T {le} T{sub N}), the effects of the molecular field H{sub Q}(T) and the elastic scattering of conduction electrons from spin fluctuations are included. Expressions for H{sub Q}(T) and the scattering rate from spin fluctuations were derived. The aim was to see if properties are enhanced or depressed by the AF ordering occurring below T{sub N}. It is found that whereas the electronic thermal conductivity K{sub s}, nuclear spin relaxation rate R{sub s}, and the longitudinal ultrasonic attenuation a{sub s}, are depressed by the AF ordering, the inverse of the magnetic penetration depth, ({lambda}(T)){sup {minus}1}, is enhanced below T{sub N}. The effect of all types of impurities is included in the study. Theoretical results for K{sub s} and ({lambda}(T)){sup {minus}1} agree with the experimental values for SmRh{sub 4}B{sub 4} (experimental data for other properties are not available in literature). In the above, T{sub N} is the Neel temperature and {Tc} is superconducting transition temperature.

• OSTI ID: 5201338
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 86:1-2; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207 -- Ceramics
Cermets
&amp; Refractories-- Superconducting Properties-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABRIKOSOV THEORY
ANTIFERROMAGNETIC MATERIALS
BORIDES
BORON COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETIC MATERIALS
MATERIALS
PHASE STUDIES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM BORIDES
RHODIUM COMPOUNDS
SAMARIUM BORIDES
SAMARIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSPORT THEORY