TY - JOUR
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.
UR - https://www.scopus.com/pages/publications/33644810275
UR - https://www.scopus.com/pages/publications/33644810275#tab=citedBy
U2 - 10.1088/0953-8984/18/11/003
DO - 10.1088/0953-8984/18/11/003
M3 - Article
AN - SCOPUS:33644810275
SN - 0953-8984
VL - 18
SP - 2955
EP - 2962
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 11
ER -