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Analysis of the fabrication process of Nb/Al-AlN/sub x//Nb tunnel junctions with low R/sub n/A values for SIS mixers

Autor: B. D. Jackson, T. M. Klapwijk, M. Kroug, M. Zuiddam, F.E. Meijer, N. N. Iosad, A.B. Ermakov, Tony Zijlstra

Publikováno v: IEEE Transactions on Applied Superconductivity, 13 (2)

We characterize the fabrication process of superconductor-insulator-superconductor junctions (SIS) based on a Nb/Al-AlN/sub x//Nb tri-layer. Utilization of the AlN/sub x/ tunnel barrier, produced by Al nitridation in a nitrogen glow discharge, enable

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a820c9e42b2d6ab1b1b7c116154afa5c
https://doi.org/10.1109/tasc.2003.813662

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Autor: N. N. Iosad, T. M. Klapwijk, B. D. Jackson, N. M. van der Pers, P. N. Dmitriev, S. Grachev, M. Zuiddam

Publikováno v: IEEE Transactions on Applied Superconductivity, 13 (2)
IEEE Transactions on Applied Superconductivity, 13(2), 3301-3304. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

We study the properties of (Nb,Ti)N films deposited by reactive magnetron sputtering in an atmosphere of argon and nitrogen at ambient substrate temperature, focusing, in particular, on the technological factors determining film texture and roughness

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f2d1ed59e695f30276657044eeda1df
https://doi.org/10.1109/tasc.2003.812296

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Texture formation in sputter-deposited (Nb0.7,Ti0.3)N thin films

Autor: S. N. Polyakov, N. M. van der Pers, B. D. Jackson, N. N. Iosad, T. M. Klapwijk, S. Grachev, V.V. Roddatis, P. N. Dmitriev

Publikováno v: Journal of Applied Physics

We studied the properties of (Nb-0.7,Ti-0.3)N films deposited by reactive magnetron sputtering in an atmosphere of argon and nitrogen at ambient substrate temperature, with a particular focus on the technological factors that determine film texture.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::068c2334ec3666de7b46d2898d41de5a
https://doi.org/10.1063/1.1510589

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1-THz low-noise SIS mixer with a double-dipole antenna

Autor: B. D. Jackson, Andrey M. Baryshev, A. V. Markov, Sergey V. Shitov, T. M. Klapwijk, N. N. Iosad, J. R. Gao

Publikováno v: Technical Physics. 47:1152-1157

A quasi-optical mixer containing two Nb/Al/AlOx/Nb superconducting tunnel junctions integrated into a NbTiN/SiO2/Al microstrip line is studied experimentally in the 800–1000 GHz frequency range. The mixer is developed as an optional front end of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c0133d69bb45fc7a061761092738a3be
https://doi.org/10.1134/1.1508081

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Characterization of the fabrication process of Nb/Al$ndash$AlNx/Nb tunnel junctions with low RnA values up to 1 $\Omega$ $\mu$m2

Autor: F.E. Meijer, N. N. Iosad, T. M. Klapwijk, B. D. Jackson, A.B. Ermakov

Publikováno v: Superconductor Science and Technology. 15:945-951

We discuss and characterize the fabrication process of superconductor–insulator–superconductor (SIS) junctions based on a Nb/Al–AlNx/Nb tri-layer. Utilization of the AlNx tunnel barrier, produced by Al nitridation in a nitrogen glow discharge,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6fd73447326e8cf40d887f8c48b165eb
https://doi.org/10.1088/0953-2048/15/6/319

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NbTiN/SiO/sub 2//Al tuning circuits for low-noise 1 THz SIS mixers

Autor: W. M. Laauwen, N. N. Iosad, Andrey M. Baryshev, G. de Lange, T. M. Klapwijk, B. D. Jackson, J. R. Gao

Publikováno v: IEEE Transactions on Appiled Superconductivity. 11:653-656

Waveguide SIS mixers in which Nb/Al-AlO/sub x//Nb tunnel junctions are integrated with NbTiN/SiO//sub 2//Al tuning circuits are shown to yield receiver noise temperatures as low as 565 K at 970 GHz. Analyzing the noise and gain of one such receiver,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e641175a71004036ac29b1c1a74cdca5
https://doi.org/10.1109/77.919429

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Superconducting transition metal nitride films for THz SIS mixers

Autor: P. N. Dmitriev, V.V. Roddatis, B. D. Jackson, A.V. Varlashkin, J. R. Gao, T. M. Klapwijk, N. N. Iosad, Sergey N. Polyakov

Publikováno v: IEEE Transactions on Applied Superconductivity, 11 (1)
IEEE Transactions on Applied Superconductivity

The development of sensitive THz SIS mixers requires a low-loss superconducting strip-line material with a transition temperature above 15 K. In this paper we examine the properties of (Nb,Ti)N, NbN, and (Nb,Zr)N thin films sputtered at ambient subst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74791884c1b5736f98bb9f846af68f94
https://doi.org/10.1109/77.919900

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Properties of DC magnetron sputtered Nb and NbN films for different source conditions

Autor: P. N. Dmitriev, T. M. Klapwijk, E.K. Kov'ev, N. N. Iosad, Sergey N. Polyakov, V.V. Roddatis

Publikováno v: IEEE Transactions on Applied Superconductivity

We have compared the quality of Nb and NbN films obtained by de magnetron sputtering from a new and a fully eroded Nh target. Since current superconducting electronic devices such as SIS mixers, RSFQ digital circuits and hot electron bolometers are p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48ac2814799747693639d86fe48e7852
https://doi.org/10.1109/77.784785

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Optimization of RF- and DC-sputtered NbTiN films for integration with Nb-based SIS junctions

Autor: N. N. Iosad, Sergey N. Polyakov, J. R. Gao, B. D. Jackson, T. M. Klapwijk, P.N. Dmitirev

Publikováno v: IEEE Transactions on Applied Superconductivity, 9(2), 1716-1719. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

NbTiN is one of the most promising materials for use in the tuning circuits of Nb-based SIS mixers for operating frequencies above the gap frequency of Nb (/spl ap/700 GHz). We examine the properties of NbTiN films obtained using an unbalanced sputte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c5326f8003d9ad008393168646f763d
https://research.rug.nl/en/publications/f013d0bc-3c74-4680-9140-3e580b67bfb1

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Low-noise 1 THz superconductor–insulator–superconductor mixer incorporating a NbTiN/SiO2/Al tuning circuit

Autor: N. N. Iosad, G. de Lange, Andrey M. Baryshev, Sergey V. Shitov, T. M. Klapwijk, B. D. Jackson, J. R. Gao

Publikováno v: Applied Physics Letters. 79:436-438

Low-noise heterodyne mixing at 1 THz is demonstrated in a quasioptical mixer incorporating Nb superconductor–insulator–superconductor tunnel junctions and a NbTiN/SiO2/Al tuning circuit. Receiver noise temperatures as low as 250 K at 850 GHz, 315

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::83823f56268fa339a10bff40786e7914
https://doi.org/10.1063/1.1384005

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