Angular dependence of pinning potential, upper critical field, and irreversibility field in underdoped BaFe1.9Co0.1As2 single crystal

Authors

Mahboobeh Shahbazi, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
S R. Ghorbani, University of WollongongFollow
S. X. Dou, University of WollongongFollow
K Y. Choi, Gyeongsang National University South Korea

RIS ID

53661

Publication Details

Shahbazi, M., Wang, X. L., Ghorbani, S. R., Dou, S. X. & Choi, K. Y. (2012). Angular dependence of pinning potential, upper critical field, and irreversibility field in underdoped BaFe1.9Co0.1As2 single crystal. Applied Physics Letters, 100 (10), 102601-1-102601-4.

Abstract

Underdoped BaFe1.9Co0.1As2 single crystal was studied by angular dependence of magneto-transport at fields up to 13 T over a wide range of temperature. Our results show that pinning potential, Uo, decreases slightly for h45 and remains constant for h45, while the upper critical field, Hc2, and the irreversibility field, Hirr, increase with h. According to anisotropic Ginzburg-Landau theory, the anisotropy was determined by scaling the resistivity under different magnetic fields below the superconducting critical temperature, Tc. Anisotropy, C, in the underdoped crystal is found to be temperature dependent and decreases from 2.1 to 1.8 for as T is reduced from 17 to 12.5 K.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205