NDLI: The effects of cobalt substitution on the thermal diffusivity of YBa$_{2}$Cu$_{3}$O$

Content Provider	Springer Nature Link
Author	Suleiman, B. M. Börjesson, L.
Copyright Year	1997
Abstract	The thermal diffusivity κ(T) of the cobalt-substituted sintered YBCO system, YBa$_{2}$Cu$_{3−x }$Co$_{ x }$O$_{7∮δ}$ (x=0.0, 0.1), has been measured to, investigate, effects of atomic substitution and charge carrier concentration on the thermal diffusion processes. The thermal diffusivity was measured in the temperature range 35–300 K, using the transient-plane-source technique. The results show that, belowT $_{ c }$, the κ(T) values of the doped (x=0.1), samples are lower than the corresponding values for the undoped (x=0.0) samples. This may be due to the difference in the free-charge carrier concentrations of the two samples. A decoupling between the conducting Cu−O planes as a result, of Co-doping in the chain sites may contribute to additional decrease in the thermal diffusivity of the doped sample. An attempt was made to explain the rise in the thermal diffusivity belowT $_{ c }$ by adopting a recent theoretical model based on the existence of weakly damped collective electron excitations of Bose type, with acoustic dispersion relation, (acoustic plasmons) inside the superconducting gap.
Starting Page	663
Ending Page	668
Page Count	6
File Format	PDF
ISSN	08961107
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	10
Issue Number	6
e-ISSN	15729605
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	1997-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Thermal diffusivity acoustic plasmons cobalt substitution Characterization and Evaluation Materials Condensed Matter Superconductivity, Superfluidity, Quantum Fluids Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	3100/3101 Condensed Matter Physics Electronic, Optical and Magnetic Materials

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