The single crystal superconducting Bi-2212 whiskers fabrication and their thermal transport properties


ALTIN S., AKSAN M. A., YAKINCI M. C., BALCİ Y.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.502, sa.1, ss.16-23, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 502 Sayı: 1
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.jallcom.2010.04.153
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.16-23
  • İnönü Üniversitesi Adresli: Evet

Özet

In this study, we have fabricated the superconducting single crystal whiskers using glass-ceramic BiSr-CaCuO material. The crystallization kinetic studies (crystallization activation energy, E-a, and the Avrami parameter, n,) were carried out using DTA data. The oxygen diffusion energy was calculated using TG data. XRD and SEM analysis of the whiskers showed Bi-2212 phase formation and the c-axis orientation. The in-plane resistivity, rho(ab), and the out-of-plane resistivity, rho(c), properties of the whiskers were investigated. The thermoelectric power. S(T), value between 10 and 300 K is found to be positive, indicating that charge carriers in the whiskers are holes. We analyzed the thermoelectric power as a function of temperature with "Two band model with linear T-term" Linear temperature dependence in the thermal conductivity down to T-c and then a sharp rise just below T-c were obtained. (C) 2010 Elsevier B.V. All rights reserved.