Resistivity broadening, upper critical fields and irreversibility lines in bulk PbMo6S8 and SnMo6S8 Chevrel phase superconductors

✍ Scribed by A. Gupta; M. Decroux; T.C. Willis; Ø. Fischer

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 232 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)92491-0

✦ Synopsis

Resistive (R(B,T)) transitions for both PbMo6S8 (PMS) and SnMo6S8 (SMS) compounds were measured in applied magnetic fields. For both compounds, the pseudo upper critical field Bc2*(T) lines determined at different constant resistance criteria show a deviation from the expected thermodynamic Bc2(T). The deviation is more pronounced in the PMS sample which has a smaller coherence length. The activation energy barriers Ub(B) extracted from the Arrhenius plots of resistivity are lower for PMS (Ub(9T) = 1570 K) than for SMS (Ub(9T) = 2250 K).