TY - JOUR
T1 - Doping- and pressure-induced change of electrical and magnetic properties in the Fe-based spin-ladder compound BaFe2 Se3
AU - Du, Fei
AU - Hirata, Yasuyuki
AU - Matsubayashi, Kazuyuki
AU - Uwatoko, Yoshiya
AU - Ueda, Yutaka
AU - Ohgushi, Kenya
PY - 2014/8/27
Y1 - 2014/8/27
N2 - We have investigated the evolution of electronic structure in the Fe-based ladder compound Ba(Fe1-xCox)2Se3 (0≤x≤0.15) by means of resistivity, magnetic susceptibility, and reflectivity measurements. Although the Co substitution into BaFe2Se3 greatly decreases the resistivity, the compound still shows an insulating behavior at x=0.15. Moreover, the insulating state at x=0.15 is robust even under the high pressure of 8 GPa. The antiferromagnetic transition temperatures are gradually suppressed by substituting Co atoms at x≤0.10, while the spin glass state is observed at x≥0.125. Our finding revealed that the substituted Co atoms play a dual effect: electron-carrier dopant and localized moment, providing a supplemental insight into the doping effect in the Fe-based superconductors.
AB - We have investigated the evolution of electronic structure in the Fe-based ladder compound Ba(Fe1-xCox)2Se3 (0≤x≤0.15) by means of resistivity, magnetic susceptibility, and reflectivity measurements. Although the Co substitution into BaFe2Se3 greatly decreases the resistivity, the compound still shows an insulating behavior at x=0.15. Moreover, the insulating state at x=0.15 is robust even under the high pressure of 8 GPa. The antiferromagnetic transition temperatures are gradually suppressed by substituting Co atoms at x≤0.10, while the spin glass state is observed at x≥0.125. Our finding revealed that the substituted Co atoms play a dual effect: electron-carrier dopant and localized moment, providing a supplemental insight into the doping effect in the Fe-based superconductors.
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U2 - 10.1103/PhysRevB.90.085143
DO - 10.1103/PhysRevB.90.085143
M3 - Article
AN - SCOPUS:84940306863
VL - 90
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 8
M1 - 085143
ER -