Characterization of different types of Nb-AlO/sub x/ based Josephson tunnel junctions

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

CHARACTERIZATION OF DIFFERENT TYPES OF Nb-AIO, BASED JOSEPHSON TUNNEL JUNCTIONS

The Nb/Al,AlO,(/Al)/Nb trilayer is deposited in a turbo pumped vacuum system. Nb and A1 films were deposited by two DC magnetron sputter guns at a rate of 200 nm/min and 22 nm/min, respectively. During sputtering the oxygen pressure was in the low lo-' mbar range. The water pressure was 10-7-10-8 mbar. The T, of the Nb films is 9.2 K. The trilayer configuration of the junctions is listed in tab...

متن کامل

Self-shunted Nb/AlOx/Nb Josephson junctions

We describe the fabrication and properties of high critical current density (Jc) Nb/AlOx/Nb Josephson junctions with deep-submicron dimensions. The junctions are fabricated using a planarized process in which all levels are patterned using a combination of optical and electron beam lithography. The base and counter electrodes are defined by reactive ion etching using quartz etch masks to give a...

متن کامل

Superelliptic Josephson Tunnel Junctions

The most important practical characteristic of a Josephson junction is its critical current. The shape of the junction determines the specific form of the magnetic-field dependence of the its Josephson current. Here we address the magnetic diffraction patterns of specially shaped planar Josephson tunnel junctions. We focus on a wide ensemble of generalized ellipses, called superellipses, which ...

متن کامل

0-π oscillations in nanostructured Nb/Fe/Nb Josephson junctions

The physics of the π phase shift in ferromagnetic Josephson junctions enables a range of applications for spin-electronic devices and quantum computing. We investigate transitions from “0” to “π” states in Nb/Fe/Nb Josephson junctions by varying the Fe barrier thickness from 0.5 nm to 5.5 nm. From magnetic measurements we estimate for Fe a magnetic dead layer of about 1.1 nm. By fitting the cha...

متن کامل

Carbon nanotube Josephson junctions with Nb contacts

We report on the preparation of carbon nanotube Josephson junctions using superconducting electrodes made of niobium. Gate-controllable supercurrents with values of up to 30 nA are induced by the proximity effect. The IV curves are hysteretic at low temperature and the corresponding switching histograms have a width of 0.5%–2%. An on-chip resistive environment integrated in the sample layout is...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: IEEE Transactions on Magnetics

سال: 1991

ISSN: 0018-9464,1941-0069

DOI: 10.1109/20.133880