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Title:
Physical properties of ferromagnetic-superconducting coexistent system from a mean-field model
Authors:
Dahal, Hari P.; Jackiewicz, Jason; Bedell, Kevin S.
Affiliation:
AA(Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA), AB(Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA), AC(Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA)
Publication:
Physical Review B, vol. 71, Issue 18, id. 184518 (PhRvB Homepage)
Publication Date:
05/2005
Origin:
APS
PACS Keywords:
Strongly correlated electron systems; heavy fermions, Band and itinerant models, Effects of internal magnetic fields, Nuclear magnetic resonance and relaxation
Abstract Copyright:
(c) 2005: The American Physical Society
DOI:
10.1103/PhysRevB.71.184518
Bibliographic Code:
2005PhRvB..71r4518D

Abstract

We study the nuclear relaxation rate 1/T1 of a ferromagnetic-superconducting system from the mean field model proposed by Karchev [Phys. Rev. Lett. 86, 846 (2001)]. This model predicts the existence of a set of gapless excitations in the energy spectrum which will affect the properties studied here, such as the density of states and, hence, 1/T1 . The study of the temperature variation of 1/T1 (for T<Tc ) shows that the usual Hebel-Slichter peak exists, but will be reduced because of the dominant role of the gapless fermions and the background magnetic behavior. We have also presented the temperature dependence of ultrasonic attenuation and the frequency dependence of electromagnetic absorption within this model. We are successful in explaining certain experimental results.
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