Technology of Ultrathin NbN and NbTiN Films for Superconducting Photodetectors

Guziewicz, M.; Słysz, W.; Borysiewicz, M.; Kruszka, R.; Sidor, Z.; Juchniewicz, Marcin; Gołaszewska, K.; Domagała, J. Z.; Rzodkiewicz, W.; Ratajczak, J.; Bar, Jan; Węgrzecki, M.; Sobolewski, Roman

doi:10.12693/aphyspola.120.a-76

Cited by 17 publications

(5 citation statements)

References 13 publications

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“…The evolution of the Tc of all our samples with annealing differs from that of several previously published results, where it is shown that annealing lowers the Tc [19,31]. Other publications show that annealing between 800 and 1000 ° C increases the Tc of the NbN samples [32][33][34].…”

Section: Critical Temperaturecontrasting

confidence: 92%

Improved critical temperature of superconducting plasma-enhanced atomic layer deposition of niobium nitride thin films by thermal annealing

et al. 2020

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The efficiency of the superconducting radio frequency cavities composed of Nb required the deposition of thickness-controlled multilayer coatings of superconductor-insulator-superconductor (S-IS) on the internal surfaces of the cavities. Herein, we report the plasma-enhanced atomic layer deposition of carbon-free NbN (50 µm thick), followed by a thermal treatment, to obtain the superconducting layer in the S-IS structure. Using (tert-butylimido)-tris(diethylamino)-niobium as the niobium precursor and H 2 and NH 3 plasma as reactive gases, the deposition and annealing parameters were optimized by studying their effects on the film properties (crystallinity, density, and composition). We demonstrated that the superconducting critical temperature (Tc) can be improved after thermal annealing up to 13.8 K, a value compatible with the targeted application. In addition to the expected densified layers and increased grain size, we observed a partial transformation of the oxide present in the as-deposited layer into niobium oxynitride, which could indicate the origin of the improvement of the superconducting properties. With low carbon and oxygen impurity concentrations in the films, this study contributes to the understanding of the relationship between the structure, composition, and superconductivity in NbN.

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Section: Critical Temperaturecontrasting

confidence: 92%

Improved critical temperature of superconducting plasma-enhanced atomic layer deposition of niobium nitride thin films by thermal annealing

et al. 2020

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“…22 The 10 nm Nb 0.5 Ti 0.5 N film was grown on a quartz substrate in Ar and N 2 gas with a NbTi target, and the 70 nm NbN film grown on a MgO substrate in N 2 atmosphere using Nb, both by reactive magnetron sputtering. 23,24 The substrates have negligible absorption in the spectral range of interest (10-100 cm −1 ) for T < 20 K. We performed the experiment at Beamline U4IR of the National Synchrotron Light Source, Brookhaven National Laboratory.…”

mentioning

confidence: 99%

“…and photodetectors [22]. The 10 nm Nb 0.5 Ti 0.5 N film was grown on a quartz substrate in Ar and N 2 gas with a NbTi target, and the 70 nm NbN film grown on a MgO substrate in N 2 atmosphere using Nb, both by reactive magnetron sputtering [23,24].…”

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confidence: 99%

Infrared vortex-state electrodynamics in type-II superconducting thin films

Park

Graf

et al. 2013

Phys. Rev. B

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The vortex-state electrodynamics of s-wave superconductors has been studied by infrared spectroscopy. Far-infrared transmission and reflection spectra of superconducting Nb 0.5 Ti 0.5 N and NbN thin films were measured in a magnetic field perpendicular to the film surface, and the optical conductivity was extracted. The data show clear reduction of superconducting signature. We consider the vortex state as a twocomponent effective medium of normal cores embedded in a BCS superconductor. The spectral features are well explained by the Maxwell-Garnett theory. Our analysis supports the presence of magnetic-fieldinduced pair-breaking effects in the superconducting component outside of the vortex cores.

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“…In addition, nickel oxides, NiO are potential for applications of electrode materials in supercapacitors due to their high electrochemical reaction activity [6]. Nickel oxide is a semitransparent p-type semiconducting material with band gap of about 3.8 eV and shows attractive electric, electrochomic and thermoelectric properties as well as high chemical resistance [7]. Due to its application as an anti-ferromagnetic material, it attracts researcher attention towards it [8].…”

Section: Introductionmentioning

confidence: 99%

Structural and Dielectric Analysis of La0.88Bi0.12Mn0.80Ni0.20O3 Composite

Sinin

Primus

Talib

et al. 2021

SSP

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Composite La0.88Bi0.12Mn0.80Ni0.20O3 was synthesized using the conventional solid-state reaction method with sintering temperature of 1200 °C for 12 hours and the dielectric properties investigated. The X-ray diffraction result shows that the composite has a rhombohedral structure with lattice parameter of a = b = c = 5.5136 Ǻ. Scanning electron microscope shows grains with approximately from 0.8 to 5.4 μm in size with presence of voids. The dielectric permittivity, εʹ and dielectric loss, εʺ were measured in the range of 298 K to 473 K where both are temperature and frequency dependent. At 1 kHz to 100 kHz, the εʹ is around 10000 and the dielectric loss tangent, tan δ is below 1.5. The electric behavior of this composite is best represented by Quasi-dc model which consists of two universal capacitors in parallel. Parameters value from the fitting indicated that high correlations of electrons between inter and intra-clusters. The activation energy, Ea calculated from the conductivity of the sample gives a value of 0.116 eV. Vibrating sample magnetometer shows that the La0.88Bi0.12Mn0.80Ni0.20O3 has a magnetic coercivity, Hc of 36.109 G and retentivity, Br, valued 2.7504 x 10-3 emu/g.

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Technology of Ultrathin NbN and NbTiN Films for Superconducting Photodetectors

Cited by 17 publications

References 13 publications

Improved critical temperature of superconducting plasma-enhanced atomic layer deposition of niobium nitride thin films by thermal annealing

Improved critical temperature of superconducting plasma-enhanced atomic layer deposition of niobium nitride thin films by thermal annealing

Infrared vortex-state electrodynamics in type-II superconducting thin films

Structural and Dielectric Analysis of La<sub>0.88</sub>Bi<sub>0.12</sub>Mn<sub>0</sub>.<sub>80</sub>Ni<sub>0.20</sub>O<sub>3</sub> Composite

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