Document Detail

Influences of alkaline earth metal substitution on the crystal structure and physical properties of magnetic RuSr1.9A0.1GdCu2O8 (A = Ca, Sr, and Ba) superconductors.
MedLine Citation:
PMID:  16853818     Owner:  NLM     Status:  MEDLINE    
We have investigated the effect of alkaline earth metal substitution on the crystal structure and physical properties of magnetic superconductors RuSr(1.9)A(0.1)GdCu(2)O(8) (A = Ca, Sr, and Ba) in order to probe an interaction between the magnetic coupling of the RuO(2) layer and the superconductivity of the CuO(2) layer. X-ray diffraction and X-ray absorption spectroscopic analyses demonstrate that the isovalent substitution of Sr ions with Ca or Ba ions makes it possible to tune the interlayer distance between the CuO(2) and the RuO(2) layers. From the measurements of electrical resistance and magnetic susceptibility, it was found that, in contrast to negligible change of magnetization, both of the alkaline earth metal substitutions lead to a notable depression of zero-resistance temperature T(c) (DeltaT(c) approximately 17-19 K). On the basis of the absence of a systematic correlation between the T(c) and the interlayer distance/magnetization, we have concluded that the internal magnetic field of the RuO(2) layer has insignificant influence on the superconducting property of the CuO(2) layer in the ruthenocuprate.
Su Gil Hur; Dae Hoon Park; Seong-Ju Hwang; Seung Joo Kim; J H Lee; Sang Young Lee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  109     ISSN:  1520-6106     ISO Abbreviation:  J Phys Chem B     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2006-07-20     Completed Date:  2007-07-19     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  United States    
Other Details:
Languages:  eng     Pagination:  21694-9     Citation Subset:  IM    
Center for Intelligent Nano-Bio Materials (CINBM), Division of Nano Sciences and Department of Chemistry, Ewha Womans University, Seoul 120-750, Korea.
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MeSH Terms
Chemistry, Physical
Copper / chemistry*
Electric Conductivity
Gadolinium / chemistry*
Metals, Alkaline Earth / chemistry*
Oxygen / chemistry*
Particle Size
Physicochemical Phenomena
Ruthenium / chemistry*
Reg. No./Substance:
0/Metals, Alkaline Earth; 7440-18-8/Ruthenium; 7440-50-8/Copper; 7440-54-2/Gadolinium; 7782-44-7/Oxygen

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