X-ray absorption measurements have been made at the Cu L3 and O K-edge on (Hg0.5Bi0.5)Sr2(Ca1-xPrx)Cu2O7-δ (x=0.35,0.50) and (Hg0.5Bi0.5)Sr2(Ca0.65Nd0.35)-Cu2O7-δ superconducting systems. Our results clearly indicate that hole density decreases with increase in Pr content. The values of Tc for Pr and Nd (x=0.35) systems are the same but the itinerant hole density is found to be larger in the latter case. In view of the fact that the density of holes depends more upon diamagnetic fraction than the Tc in these superconducting systems, we can conclude that superconducting properties are different for these two cases.
XANES STUDY OF THE DEPENDENCE OF THE ITINERANT HOLE DENSITY IN THE SUPERCONDUCTING Hg0.5Bi0.5Sr2Ca1-xRxCu2O7-δ (R=Nd and Pr) SYSTEM / S. K., Gaur; D., Chaturvedi; R. K., Singhal; B., Dalela; S., Dalel; Saini, Naurang Lal; D., Pelloquin; F., Studer; C. T., Chen; Anurag, Gupta; S. K. AGRAWAL AND K. B., Garg. - In: INTERNATIONAL JOURNAL OF MODERN PHYSICS B. - ISSN 0217-9792. - 18:(2004), pp. 2849-2862. [10.1142/S0217979204025282]
XANES STUDY OF THE DEPENDENCE OF THE ITINERANT HOLE DENSITY IN THE SUPERCONDUCTING Hg0.5Bi0.5Sr2Ca1-xRxCu2O7-δ (R=Nd and Pr) SYSTEM
SAINI, Naurang Lal;
2004
Abstract
X-ray absorption measurements have been made at the Cu L3 and O K-edge on (Hg0.5Bi0.5)Sr2(Ca1-xPrx)Cu2O7-δ (x=0.35,0.50) and (Hg0.5Bi0.5)Sr2(Ca0.65Nd0.35)-Cu2O7-δ superconducting systems. Our results clearly indicate that hole density decreases with increase in Pr content. The values of Tc for Pr and Nd (x=0.35) systems are the same but the itinerant hole density is found to be larger in the latter case. In view of the fact that the density of holes depends more upon diamagnetic fraction than the Tc in these superconducting systems, we can conclude that superconducting properties are different for these two cases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
