Upper critical field of niobium nitride thin films

被引：0
|
作者：
M. A. Vasyutin
N. D. Kuz’michev
D. A. Shilkin
机构：
[1] Ogarev Mordovia State University,
来源：
Physics of the Solid State | 2016年 / 58卷
关键词：
Critical Field; Critical Magnetic Field; Spin Hall Effect; Niobium Nitride; Spin Paramagnetism;
D O I：
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摘要：
The temperature dependences of the superconducting transition of niobium nitride (NbN) thin films have been investigated via the first harmonic of the voltage in dc magnetic fields of up to 8 T. The temperature dependence of the second critical field of NbN has been determined. The parameter responsible for the effect of spin paramagnetism in this material and the temperature dependence of the upper critical field that describes well the experimental data have been found in terms of the Werthamer–Helfand–Hohenberg (WHH) theory. The key parameters of the superconductor have been estimated from the transport and optical measurements.
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页码：236 / 239
页数：3
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