A study on the thermoelectric power and thermal conductivity properties of the Y1-xNdxBa2Cu3O7-? system
Küçük Resim Yok
Tarih
2008
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Sa
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Y1-xNdxBa2Cu3O7-delta (x=0.0-1.0) samples were prepared by solid-state reaction method. Xray diffraction analysis and SEM investigation were used for structural characterization of the materials obtained. The Nd substitution into the YBaCuO system leads to decrease in the superconducting transition temperature and the zero resistance temperature. The influence of Nd substitution on thermoelectric properties of materials prepared was investigated. The thermoelectric power values of all the samples were obtained to be positive. It was found that the carrier concentration and Fermi energy level decreased with increasing the Nd concentration. A linear temperature dependence in the thermal conductivity down to the superconducting transition temperature and then a sharp rise just below the superconducting transition temperature was obtained. The thermal conductivity magnitude was suppressed by substitution of Nd which indicates the quasiparticles scattering on the Nd containing defects. (C) 2007 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
superconductors, electrical properties, thermal conductivity
Kaynak
Journal of Materials Processing Technology
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
207
Sayı
1-3
