NDLI: A novel HTS magnetometer, exploiting the low jc of bulk YBCO

Content Provider	IEEE Xplore Digital Library
Author	Gallop, J.C. Lilleyman, S. Langham, C.D. Radcliffe, W.J. Stewart, M.
Copyright Year	1965
Abstract	The authors report a novel form of magnetometer which is based on the low critical magnetic field H/sub c1/ of sintered samples of the high-temperature ceramic superconductor YBa/sub 2/Cu/sub 3/O/sub y/. By driving a sample of the superconductor around a magnetization hysteresis loop at a frequency of approximately 100 kHz and detecting the induced voltage in a coil coupled to the sample at the second harmonic of the drive frequency, they find that this voltage is linearly dependent on the applied DC magnetic field in which the sample is situated. They present a model which explains the operation of this magnetometer. The device, while not sensitive as a SQUID (superconducting quantum interference device), has the advantage of a wider dynamic range and direct measurement of flux density unlike a SQUID, which is only capable of sensing flux density changes. When operated at 77 K the prototype magnetometer has already demonstrated a sensitivity at least 10 times better than that of a commercial flux-gate magnetometer. The system also appears to provide a simple method for investigation of flux flow in these materials.<>
Sponsorship	IEEE Magnetics Society
Starting Page	896
Ending Page	898
Page Count	3
File Size	321974
File Format	PDF
ISSN	00189464
Volume Number	25
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High temperature superconductors Superconducting coils SQUID magnetometers Voltage Magnetic field measurement Magnetic fields Ceramics Magnetization Magnetic hysteresis Frequency locked loops
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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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
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