Specificities of Current–Voltage Characteristics of NbN Superconducting Films in a Magnetic Field

Vasyutin, M. A.; Kuz’michev, N. D.; Shilkin, D. A.

doi:10.1134/s0031918x20090094

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The value of α determined from α = −0.52758 × ( dHc2 dT ) Tc is highest for the R-NbN film (α = 6.3) when compared with that of R-MoN (α = 1.7) and R-Nb (α = 0.3). The obtained α of NbN is comparable with the values cited in the literature [29]. The λ values of the reference films R-NbN and R-MoN obtained from the fit are similar (λ of R-NbN = 0.8 and λ of R-MoN = 0.9).…”

Section: Systemsupporting

confidence: 87%

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi_1.95Sb_0.05Se₃: a comparative study

Abhirami¹,

Amaladass²,

Vinod³

et al. 2022

Supercond. Sci. Technol.

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The superconducting properties of DC magnetron sputtered Nb, NbN, and MoN films deposited on Sb-doped bismuth selenide (BSS) topological insulator (TI) films have been studied. In this two-fold study, firstly, thick superconducting films of ~100 nm have been studied to find the modifications in the superconducting properties of the films caused by the surface morphology of PLD-grown BSS substrates. A drastic suppression in the critical current density has been observed in the bilayers, which has been ascribed to the strong influence of the substrate on the morphology of the superconducting film and the enhanced density of superconducting weak links. The temperature dependence of the critical magnetic field has been carefully analyzed within the purview of the Werthamer-Hohenberg-Helfand theory, taking into account the effects of spin paramagnetism and spin-orbit scattering. As the second part of the study, ultra-thin bilayers of NbN-BSS, with thickness of the order of the coherence length (~5 nm), have been grown to study the superconducting properties within the proximity regime. A ~3.5 K suppression in Tc has been seen in the NbN(5 nm)-BSS bilayer, due to a combination of interface roughness and superconducting proximity, while a suppression of 0.6 K has been observed in the BSS(6 nm)-NbN(5 nm) bilayer, which is surmised to be solely due to the superconducting proximity effect.

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Section: Systemsupporting

confidence: 87%

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi_1.95Sb_0.05Se₃: a comparative study

Abhirami¹,

Amaladass²,

Vinod³

et al. 2022

Supercond. Sci. Technol.

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“…1). The measurement technique and film parameters are described in more details in [10]. Experimental data presented here were obtained on the sample 400 nm thick at T c = 16.3 K.…”

mentioning

confidence: 99%

Experimental method for controlling the overheating of superconducting films under the action of a pulsed current

Vasyutin

Kuz’michev

D.A.

2022

Technical Physics Letters

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Using time sweeps of the current through a sample of a superconducting film, the effect of the current sweep rate on the process of heat propagation from current contacts is investigated. The samples used were NbN films with temperatures below and above the temperature of transition to the superconducting state. A method for determining the critical heating of key zones of the sample is proposed. The propagation velocities of the resistive front and normal domain in a superconductor are estimated at different temperatures. Keywords: niobium nitride films, time sweep of the current, resistive front, normal domain.

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Anisotropic Magnetization of an NbN Film

Gokhfeld

Savitskaya

Popkov³

et al. 2022

J. Exp. Theor. Phys.

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Specificities of Current–Voltage Characteristics of NbN Superconducting Films in a Magnetic Field

Cited by 3 publications

References 13 publications

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi_1.95Sb_0.05Se₃: a comparative study

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi_1.95Sb_0.05Se₃: a comparative study

Experimental method for controlling the overheating of superconducting films under the action of a pulsed current

Anisotropic Magnetization of an NbN Film

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Specificities of Current–Voltage Characteristics of NbN Superconducting Films in a Magnetic Field

Cited by 3 publications

References 13 publications

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi1.95Sb0.05Se3: a comparative study

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi1.95Sb0.05Se3: a comparative study

Experimental method for controlling the overheating of superconducting films under the action of a pulsed current

Anisotropic Magnetization of an NbN Film

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Product

Resources

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Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi_1.95Sb_0.05Se₃: a comparative study

Superconducting properties of Nb, NbN, and MoN thin films grown on topological insulator Bi_1.95Sb_0.05Se₃: a comparative study