Systematic Study of Vortex Pinning and a Liquid–Glass Phase Transition in BaFe2–xNixAs2 Single Crystals

被引：0
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作者：
V. A. Vlasenko
O. A. Sobolevskiy
A. V. Sadakov
K. S. Pervakov
S. Yu. Gavrilkin
A. V. Dik
Yu. F. Eltsev
机构：
[1] Russian Academy of Sciences,Lebedev Physical Institute
[2] Moscow Institute of Physics and Technology (State University),undefined
来源：
JETP Letters | 2018年 / 107卷
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摘要：
The vortex pinning and liquid-glass transition have been studied in BaFe2–xNixAs2 single crystals with different doping levels (x = 0.065, 0.093, 0.1, 0.14, 0.18). We found that Ni-doped Ba-122 has rather narrow vortex-liquid state region. Our results show that the temperature dependence of the resistivity as well as I−V characteristics of Ni-doped Ba-122 is consistent with 3D vortex-glass model. It was found that -pinning gives the main contribution to overall pinning in 122 Ni-doped system. The vortex phase diagrams for different doping levels were built based on the obtained data of temperature of the vortex-glass transition Tg and the upper critical magnetic field Hc2.
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页码：119 / 125
页数：6
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