Effect of pressure on the superconducting transition temperature of doped and neutron-damaged MgB2

Measurements of the superconducting transition temperatures for Al-doped, C-doped and neutron-damaged annealed MgB2 samples under pressure up to -8 kbar are presented. The dTc/dP values change systematically with the decrease of the ambient pressure Tc in a regular fashion. The evolution of the pres...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 420; no. 3-4; pp. 83 - 87
Main Authors BUD'KO, S. L, WILKE, R. H. T, ANGST, M, CANFIELD, P. C
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Science 01.04.2005
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cuprates superconductors (high tc and insulating parent compounds)
Exact sciences and technology
Lattice dynamics
Physics
Superconductivity
Pressure effects
Superconducting transitions
74.62.Dh
74.62.Fj
74.70.Ad Superconductors
Doping
High-Tc superconductors
Damage
Magnesium borides
Phonon spectra
MgB2
High pressure
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Summary:Measurements of the superconducting transition temperatures for Al-doped, C-doped and neutron-damaged annealed MgB2 samples under pressure up to -8 kbar are presented. The dTc/dP values change systematically with the decrease of the ambient pressure Tc in a regular fashion. The evolution of the pressure derivatives can be understood assuming that the change in phonon spectrum is a dominant contribution to dTc/dP.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2005.02.001