Mixed state in antiferromagnetic superconductors

Journal Article · Thu Oct 01 04:00:00 EDT 1981 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.24.3830· OSTI ID:6022984

Sakai, O; Tachiki, M; Koyama, T; Matsumoto, H; Umezawa, H

The free energy of the mixed state in antiferromagnetic superconductors were derived. The spin magnetic moment induced by the magnetic field of vortices changes drastically at the transition boundary between the antiferromagnetic state and the forced-ferromagnetic state. This effect causes a kink in the curves of the upper and lower critical fields versus temperature at the boundary. When the Neel temperature is very low compared with the superconducting transition temperature, the effect becomes strong enough to cause a dip in the curve of the upper critical field versus temperature. Even in this case the flux density at the upper critical field monotonically decreases with increasing temperature as in usual nonmagnetic superconductors. The present theory will explain the temperature dependence of the upper critical field observed in DyMo/sub 6/S/sub 8/. The magnetization curves were obtained for various cases of parameters.

• Research Organization: The Research Institute for Iron, Steel, and Other Metals, Tohoku University, Katahira, Sendai 980, Japan
• OSTI ID: 6022984
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 24:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
BAND THEORY
CHALCOGENIDES
CRITICAL FIELD
DYSPROSIUM COMPOUNDS
DYSPROSIUM SULFIDES
ENERGY
EXCHANGE INTERACTIONS
FREE ENTHALPY
INTERACTIONS
MAGNETIC FIELDS
MAGNETIC MATERIALS
MATERIALS
MIXED STATE
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NEEL TEMPERATURE
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS
VORTICES