The interrelationship of Cu effective charge and superconductivity in the T '-type Gd1.85-xPrxCe0.15CuOy system

Authors
Gupta, S Prakash, O Padalia, BD Gopalakrishnan, IK Yakhmi, JV Patnaik, AK
Citation
S. Gupta et al., The interrelationship of Cu effective charge and superconductivity in the T '-type Gd1.85-xPrxCe0.15CuOy system, J PHYS-COND, 12(1), 2000, pp. L9-L12
Citations number
40
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
12
Issue
1
Year of publication
2000
Pages
L9 - L12
Database
ISI
SICI code
0953-8984(20000110)12:1<L9:TIOCEC>2.0.ZU;2-T
Abstract
The lattice oxygen content (y) is measured and the effective charge (n) on Cu is calculated for the T'-type Gd1.85-xPrxCe0.15CuOy 0.0 less than or equ al to x less than or equal to 1.85 compounds. It is found that the supercon ductive response (T-c onset) of the samples is related to n. Whenever n les s than or equal to 1.87 (+/-0.01), the compounds are superconducting. The o ptimum T-c is seen for n similar to 1.79 which is in good agreement with th e values of n (1.77 less than or equal to n less than or equal to 1.84) cal culated from the reported y in different optimum TcT'-cuprates. This brings out a universality in the interrelationship between n and T-c.