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We report on the development of highly sensitive SQUIDs featuring sub-micrometer loop dimensions. The integration of high quality and low capacitance SIS Nb/AlOx/Nb cross-type Josephson tunnel junctions results in white flux noise levels as…

Superconductivity · Physics 2015-01-06 M. Schmelz , Y. Matsui , R. Stolz , V. Zakosarenko , T. Schönau , S. Anders , S. Linzen , H. Itozaki , H. -G. Meyer

We present the design, realization and performance of a three-axis vector nano Superconducting QUantum Interference Device (nanoSQUID). It consists of three mutually orthogonal SQUID nanoloops that allow distinguishing the three components…

Superconductivity · Physics 2016-06-24 M. J. Martínez-Pérez , D. Gella , B. Müller , V. Morosh , R. Wöbling , J. Sesé , O. Kieler , R. Kleiner , D. Koelle

We investigate electric transport and noise properties of microstrip-type submicron direct current superconducting quantum interference devices (dc SQUIDs) based on Nb thin films and overdamped Josephson junctions with a HfTi barrier. The…

We report on the fabrication and characterization of microSQUID devices based on nanoscale vanadium/copper/vanadium Josephson weak links. Magnetically driven quantum interference patterns have been measured for temperatures in the 0.24 - 2…

Mesoscale and Nanoscale Physics · Physics 2013-09-06 Alberto Ronzani , Matthieu Baillergeau , Carles Altimiras , Francesco Giazotto

We investigated, at temperature $4.2\,\mathrm{K}$, electric transport, flux noise and resulting spin sensitivity of miniaturized Nb direct current superconducting quantum interference devices (SQUIDs) based on submicron Josephson junctions…

Superconductivity · Physics 2015-05-28 J. Nagel , O. F. Kieler , T. Weimann , R. Wölbing , J. Kohlmann , A. B. Zorin , R. Kleiner , D. Koelle , M. Kemmler

We present transport measurements of unshunted dc superconducting quantum interference devices (SQUIDs) consisting of 30 nm wide aluminum nanobridges of varying length L contacted with two and three dimensional banks. 3D nanobridge SQUIDs…

Mesoscale and Nanoscale Physics · Physics 2015-05-18 R. Vijay , E. M. Levenson-Falk , D. H. Slichter , I. Siddiqi

We present a method for fabricating Josephson junctions and superconducting quantum interference devices (SQUIDs) which is based on the local anodization of niobium strip lines 3 to 6.5 nm-thick under the voltage-biased tip of an Atomic…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 V. Bouchiat , M. Faucher , C. Thirion , W. Wernsdorfer , T. Fournier , B. Pannetier

Superconducting Quantum Interference Devices (SQUIDs) are one of the most popular devices in superconducting electronics. They combine the Josephson effect with the quantization of magnetic flux in superconductors. This gives rise to one of…

Superconductivity · Physics 2018-05-21 M. J. Martínez-Pérez , D. Koelle

We present results on ultra low noise YBa$_2$Cu$_3$O$_{7-\delta}$ nano Superconducting QUantum Interference Devices (nanoSQUIDs). To realize such devices, we implemented high quality YBCO nanowires, working as weak links between two…

Superconductivity · Physics 2014-03-07 Riccardo Arpaia , Marco Arzeo , Shahid Nawaz , Sophie Charpentier , Floriana Lombardi , Thilo Bauch

We present measurements of an amplifier based on a dc superconducting quantum interference device (SQUID) with submicron Al-AlOx-Al Josephson junctions. The small junction size reduces their self-capacitance and allows for the use of…

Superconductivity · Physics 2015-05-19 M. P. DeFeo , P. Bhupathi , K. Yu , T. W. Heitmann , C. Song , R. McDermott , B. L. T. Plourde

We present the driven response at T=30mK of 6 GHz superconducting resonators constructed from capacitively-shunted three dimensional (3D) aluminum nanobridge superconducting quantum interference devices (nanoSQUIDs). We observe flux…

Superconductivity · Physics 2011-04-08 E. M. Levenson-Falk , R. Vijay , I. Siddiqi

We demonstrate a highly linear superconducting quantum interference device (SQUID) amplifier based on a double-loop (Bi-SQUID) architecture incorporating three superconductor-normal metal-superconductor (S-N-S) junctions. Fabricated using…

Superconductivity · Physics 2025-10-06 G. Trupiano , E. Riccardi , C. Puglia , M. Kiczynski , A. Gardin , G. De Simoni , G. C. Tettamanzi , F. Giazotto

We designed and fabricated a new type of superconducting quantum interference device (SQUID) susceptometers for magnetic imaging of quantum materials. The 2-junction SQUID sensors employ 3D Nb nano-bridges fabricated using electron beam…

Mesoscale and Nanoscale Physics · Physics 2019-05-22 Y. P. Pan , S. Y. Wang , X. Y. Liu , Y. S. Lin , L. X. Ma , Y. Feng , Z. Wang , L. Chen , Y. H. Wang

Superconducting quantum interference devices (SQUIDs) that incorporate two superconductor/insulator/superconductor (SIS) Josephson junctions in a closed loop form the core of some of the most sensitive detectors of magnetic and electric…

Mesoscale and Nanoscale Physics · Physics 2021-08-11 Taewan Noh , Andrew Kindseth , Venkat Chandrasekhar

As the quantum generation of electronics takes the stage, a cast of important support electronics is needed to connect these novel devices to our classical worlds. In the case of superconducting electronics, this is a challenge because the…

Applied Physics · Physics 2019-10-25 Hao Li , Ethan Y. Cho , Han Cai , Shane A. Cybart

A superconducting quantum interference device (SQUID) miniaturized into nanoscale is promising in the inductive detection of a single electron spin. A nano-SQUID with a strong spin coupling coefficient, a low flux noise, and a wide working…

Mesoscale and Nanoscale Physics · Physics 2016-12-28 Lei Chen , Hao Wang , Xiaoyu Liu , Long Wu , Zhen Wang

Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. This letter presents the fabrication and investigation of superconducting quantum interference devices…

A new type of a superconducting quantum interference device (SQUID) based on a single superconducting loop without Josephson junctions and with asymmetric link-up of current leads is proposed. This SQUID offers advantages in simplicity of…

Superconductivity · Physics 2015-06-19 A. A. Burlakov , V. L. Gurtovoi , A. I. Ilin , A. V. Nikulov , V. A. Tulin

We report on the development of a new family of SQUID current sensors based on sub-micron cross-type Josephson tunnel junctions. Their low total junction capacitance permit high usable voltage swings of more than 100 {\mu}V and exceptional…

Superconductivity · Physics 2017-06-19 M. Schmelz , V. Zakosarenko , T. Schönau , S. Anders , J. Kunert , M. Meyer , H. -G. Meyer , R. Stolz

We have investigated asymmetrically shunted Nb/Al-AlO$_x$/Nb direct current (dc) superconducting quantum interference devices (SQUIDs). While keeping the total resistance $R$ identical to a comparable symmetric SQUID with $R^{-1} = R_1^{-1}…

Superconductivity · Physics 2015-06-05 M. Rudolph , J. Nagel , J. M. Meckbach , M. Kemmler , M. Siegel , K. Ilin , D. Koelle , R. Kleiner
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