Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1−xMx)3O7−δ (M = Fe, Ni, Zn and Mn)
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1−xMx)3O7−δ (M = Fe, Ni, Zn and Mn)
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| Creator |
Chakraborty, Tirthankar
Gahtori, Bhasker Soni, Ajay Okram, G. S. Agarwal, S. K. Chen, Y. S. Kuo, Y. K. -, Geetha Rao, Ashok Sarkar, Chandan Kumar |
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| Subject |
Physics
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| Description |
Measurements of transition temperature, magneto-resistance, thermal conductivity, thermo-electric power and specific heat have been carried out on co-doped samples of Eu0.95Pr0.05Ba2(Cu1−xMx)3O7−δ (M = Fe, Ni, Zn and Mn) compounds. It is found that all samples exhibit metallic behavior, except the co-doped sample of Fe that shows semiconducting behavior. It is seen that the upper-critical field Hc2 decreases with Pr-doping. However, an increase in Hc2 for dopants like Fe and Mn is observed. Thermal conductivity for the pristine sample of EuBa2Cu3O7−δ (Eu-123) exhibits a pronounced hump below the superconducting transition temperature TC. However, the peak height of the hump decreases with Pr-doping and such a feature is further suppressed in the co-doped samples. The negative sign of the measured thermo-electric power of Eu-123 indicates that the dominant carrier in this sample is electron-like, whereas it turns to hole-like for all of the doped samples. A jump in specific heat CP is detected in the pure sample of Eu-123 at TC, while only a change in slope in CP is seen around the transition temperature in the Pr-doped sample.
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| Publisher |
Elsevier
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| Date |
2010-01-06
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/115/1/89.pdf
Chakraborty, Tirthankar and Gahtori, Bhasker and Soni, Ajay and Okram, G. S. and Agarwal, S. K. and Chen, Y. S. and Kuo, Y. K. and -, Geetha and Rao, Ashok and Sarkar, Chandan Kumar (2010) Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1−xMx)3O7−δ (M = Fe, Ni, Zn and Mn). Physica C: Superconductivity, 470 (3). pp. 244-249. ISSN 0921-4534 |
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| Relation |
http://dx.doi.org/10.1016/j.physc.2010.01.011
http://npl.csircentral.net/115/ |
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