Electrical transport measurements under pressure for BaFe2As2 compounds doped with Co, Cr, or Sn

TitleElectrical transport measurements under pressure for BaFe2As2 compounds doped with Co, Cr, or Sn
Publication TypeJournal Article
Year of Publication2010
AuthorsColombier E, Torikachvili MS, Ni N, Thaler A, Bud'ko SL, Canfield PC
Journal TitleSuperconductor Science & Technology
Volume23
Pages054003
Date Published05/01
ISBN Number0953-2048
Accession NumberISI:000277029800008
Abstract

We investigate the in-plane resistivity of single crystalline samples of Ba(Fe1-xCox)(2)As-2 (x = 0.038, 0.047, 0.074, 0.1 and 0.114), Ba(Fe0.973Cr0.027)(2)As-2 and slightly tin-doped BaFe2As2 under various pressures up to 7.5 GPa, in order to establish temperature-pressure, T(P), phase diagrams and to compare the influence of pressure and doping on superconductivity. At ambient pressure, cobalt doping is known to lead to a decrease in the combined magnetic and structural transition temperature T-0. Likewise, an increase of pressure tends to have the same effect for Ba(Fe1-xCox)(2)As-2 for the various values of x. As was seen in the T(P) phase diagram of BaFe2As2, a superconducting dome is observed for Ba(Fe1-xCox)(2)As-2 samples with the dome shifted to lower temperatures and pressures with increased cobalt doping levels. A very different behaviour is noticed for Ba(Fe0.973Cr0.027)(2)As-2 and the slightly tin-doped BaFe2As2 with the decrease of T-0 being close to linear down to 2 K, and no obvious sign of superconductivity in the pressure range investigated.

URL<Go to ISI>://000277029800008