Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1-xMx)3O7-δ (M = Fe, Ni, Zn and Mn)

Tirthankar Chakraborty; Bhasker Gahtori; Ajay Soni; G. S. Okram; S. K. Agarwal; Y. S. Chen; Y. K. Kuo; Geetha; Ashok Rao; Chandan Kumar Sarkar

doi:10.1016/j.physc.2010.01.011

Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1-xMx)3O7-δ (M = Fe, Ni, Zn and Mn)

Tirthankar Chakraborty, Bhasker Gahtori, Ajay Soni, G. S. Okram, S. K. Agarwal, Y. S. Chen, Y. K. Kuo, Geetha, Ashok Rao, Chandan Kumar Sarkar

Department of Physics, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

4 Citations (SciVal)

Abstract

Measurements of transition temperature, magneto-resistance, thermal conductivity, thermo-electric power and specific heat have been carried out on co-doped samples of Eu_0.95Pr_0.05Ba₂(Cu_1-xM_x)₃O_7-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 H_c2 decreases with Pr-doping. However, an increase in H_c2 for dopants like Fe and Mn is observed. Thermal conductivity for the pristine sample of EuBa₂Cu₃O_7-δ (Eu-123) exhibits a pronounced hump below the superconducting transition temperature T_C. 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 C_P is detected in the pure sample of Eu-123 at T_C, while only a change in slope in C_P is seen around the transition temperature in the Pr-doped sample.

Original language	English
Pages (from-to)	244-249
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	470
Issue number	3
DOIs	https://doi.org/10.1016/j.physc.2010.01.011
Publication status	Published - 01-02-2010

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Electronic, Optical and Magnetic Materials

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10.1016/j.physc.2010.01.011

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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)",

abstract = "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.",

author = "Tirthankar Chakraborty and Bhasker Gahtori and Ajay Soni and Okram, {G. S.} and Agarwal, {S. K.} and Chen, {Y. S.} and Kuo, {Y. K.} and Geetha and Ashok Rao and Sarkar, {Chandan Kumar}",

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AU - Chakraborty, Tirthankar

AU - Gahtori, Bhasker

AU - Soni, Ajay

AU - Okram, G. S.

AU - Agarwal, S. K.

AU - Chen, Y. S.

AU - Kuo, Y. K.

AU - Geetha,

AU - Rao, Ashok

AU - Sarkar, Chandan Kumar

PY - 2010/2/1

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AB - 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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Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1-xMx)3O7-δ (M = Fe, Ni, Zn and Mn)

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