NDLI: Vector Pickup System Customized for Scanning SQUID Microscopy

Content Provider	IEEE Xplore Digital Library
Author	Miyajima, S. Okamoto, T. Matsumoto, H. Huy, H.T. Hayashi, M. Maezawa, M. Hidaka, M. Ishida, T.
Copyright Year	2002
Abstract	We propose a novel system of a 3-D scanning superconducting quantum interference device (SQUID) microscope with high sensitivity for magnetic fields and high spatial resolution. Our 3-D scanning SQUID microscope consists of an XYZ piezodriven scanner for controlling the position of the pickup coils, three SQUID sensors, and the three-channel SQUID electronics at room temperature. Three SQUID sensors are fabricated in the same chip, and each SQUID has a pickup coil for XYZ directions, respectively. The SQUIDs used in our system are reproducibly fabricated using a Nb multilayer process of a fabrication center named CRAVITY. Pickup coils were built either in multiply winding numbers for enhancing sensitivity or in smaller inner diameters for improving spatial resolution. Three pickup coils with readout circuits are configured in orthogonal with each other and are acting as a vector sensor of the local magnetic field. At this moment, we succeeded to design some SQUIDs with 1-D and 3-D pickup coils. The critical current density J_c of a Josephson junction (JJ) and the minimum critical current I√ of JJ are 320 A/cm² and 12.5 μA, respectively. The size of a chip is 2.9 mm × 2.9 mm, and the inner diameter of the pickup coil can be reduced down to 4 μm. The experimental I-V characteristic of fabricated SQUIDs was suitable for use in a scanning SQUID system. We have also fabricated a SQUID stage for installation in a cryostat for the experiment of 1-D SQUID sensors.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1
Ending Page	4
Page Count	4
File Size	420603
File Format	PDF
ISSN	10518223
Volume Number	25
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	SQUIDs Coils Microscopy Magnetic force microscopy Three-dimensional displays Magnetic sensors vector pick up SQUID scanning SQUID microscopy vector pickup Scanning SQUID microscopy
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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