Effect of Mn doping on the specific heat of the high TC superconductor REBa2Cu3Oy (RE = Y,Gd)

Ashok Rao, S. Radheshyam, Anirban Das, Bhasker Gahtori, S. K. Agarwal, Y. F. Lin, K. M. Sivakumar, Y. K. Kuo

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Abstract

We present measurements of specific heat in Mn-doped compounds REBa 2(Cu1-xMnx)3Oy (RE ≤ Y and Gd) with 0≤x≤2%. It is found that the transition temperature of Mn-doped YBa2(Cu1-xMnx)3O y (YBaCuMnO) compounds does not change appreciably. On the other hand, in the case of GdBa2(Cu1-xMnx) 3Oy (GdBaCuMnO) samples, the transition temperature decreases noticeably with the increase in Mn concentration. In REBaCuMnO, a jump in specific heat at the superconducting transition was observed for a low concentration of Mn; however, only a small change in slope was noticed for Mn concentrations above 1%. Replacing 0.5% Cu by Mn has only a marginal effect on the transition temperature, but a three-fold suppression of the specific heat jump is observed with such a substitution. This finding clearly demonstrates that these constituents are being incorporated into the superconductors as a whole and not in the form of a local cluster.

Original languageEnglish
Pages (from-to)2955-2962
Number of pages8
JournalJournal of Physics Condensed Matter
Volume18
Issue number11
DOIs
Publication statusPublished - 22-03-2006

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Superconducting materials
Superconducting transition temperature
Specific heat
transition temperature
Doping (additives)
specific heat
low concentrations
Substitution reactions
retarding
substitutes
slopes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Rao, Ashok ; Radheshyam, S. ; Das, Anirban ; Gahtori, Bhasker ; Agarwal, S. K. ; Lin, Y. F. ; Sivakumar, K. M. ; Kuo, Y. K. / Effect of Mn doping on the specific heat of the high TC superconductor REBa2Cu3Oy (RE = Y,Gd). In: Journal of Physics Condensed Matter. 2006 ; Vol. 18, No. 11. pp. 2955-2962.
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abstract = "We present measurements of specific heat in Mn-doped compounds REBa 2(Cu1-xMnx)3Oy (RE ≤ Y and Gd) with 0≤x≤2{\%}. It is found that the transition temperature of Mn-doped YBa2(Cu1-xMnx)3O y (YBaCuMnO) compounds does not change appreciably. On the other hand, in the case of GdBa2(Cu1-xMnx) 3Oy (GdBaCuMnO) samples, the transition temperature decreases noticeably with the increase in Mn concentration. In REBaCuMnO, a jump in specific heat at the superconducting transition was observed for a low concentration of Mn; however, only a small change in slope was noticed for Mn concentrations above 1{\%}. Replacing 0.5{\%} Cu by Mn has only a marginal effect on the transition temperature, but a three-fold suppression of the specific heat jump is observed with such a substitution. This finding clearly demonstrates that these constituents are being incorporated into the superconductors as a whole and not in the form of a local cluster.",
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Rao, A, Radheshyam, S, Das, A, Gahtori, B, Agarwal, SK, Lin, YF, Sivakumar, KM & Kuo, YK 2006, 'Effect of Mn doping on the specific heat of the high TC superconductor REBa2Cu3Oy (RE = Y,Gd)', Journal of Physics Condensed Matter, vol. 18, no. 11, pp. 2955-2962. https://doi.org/10.1088/0953-8984/18/11/003

Effect of Mn doping on the specific heat of the high TC superconductor REBa2Cu3Oy (RE = Y,Gd). / Rao, Ashok; Radheshyam, S.; Das, Anirban; Gahtori, Bhasker; Agarwal, S. K.; Lin, Y. F.; Sivakumar, K. M.; Kuo, Y. K.

In: Journal of Physics Condensed Matter, Vol. 18, No. 11, 22.03.2006, p. 2955-2962.

Research output: Contribution to journalArticle

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T1 - Effect of Mn doping on the specific heat of the high TC superconductor REBa2Cu3Oy (RE = Y,Gd)

AU - Rao, Ashok

AU - Radheshyam, S.

AU - Das, Anirban

AU - Gahtori, Bhasker

AU - Agarwal, S. K.

AU - Lin, Y. F.

AU - Sivakumar, K. M.

AU - Kuo, Y. K.

PY - 2006/3/22

Y1 - 2006/3/22

N2 - We present measurements of specific heat in Mn-doped compounds REBa 2(Cu1-xMnx)3Oy (RE ≤ Y and Gd) with 0≤x≤2%. It is found that the transition temperature of Mn-doped YBa2(Cu1-xMnx)3O y (YBaCuMnO) compounds does not change appreciably. On the other hand, in the case of GdBa2(Cu1-xMnx) 3Oy (GdBaCuMnO) samples, the transition temperature decreases noticeably with the increase in Mn concentration. In REBaCuMnO, a jump in specific heat at the superconducting transition was observed for a low concentration of Mn; however, only a small change in slope was noticed for Mn concentrations above 1%. Replacing 0.5% Cu by Mn has only a marginal effect on the transition temperature, but a three-fold suppression of the specific heat jump is observed with such a substitution. This finding clearly demonstrates that these constituents are being incorporated into the superconductors as a whole and not in the form of a local cluster.

AB - We present measurements of specific heat in Mn-doped compounds REBa 2(Cu1-xMnx)3Oy (RE ≤ Y and Gd) with 0≤x≤2%. It is found that the transition temperature of Mn-doped YBa2(Cu1-xMnx)3O y (YBaCuMnO) compounds does not change appreciably. On the other hand, in the case of GdBa2(Cu1-xMnx) 3Oy (GdBaCuMnO) samples, the transition temperature decreases noticeably with the increase in Mn concentration. In REBaCuMnO, a jump in specific heat at the superconducting transition was observed for a low concentration of Mn; however, only a small change in slope was noticed for Mn concentrations above 1%. Replacing 0.5% Cu by Mn has only a marginal effect on the transition temperature, but a three-fold suppression of the specific heat jump is observed with such a substitution. This finding clearly demonstrates that these constituents are being incorporated into the superconductors as a whole and not in the form of a local cluster.

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