DOI: 10.1029/rg014i004p00591. Magnetometers using RF‐driven squids and their applications in rock magnetism and paleomagnetism

Magnetometers using RF‐driven squids and their applications in rock magnetism and paleomagnetism

10.1029/rg014i004p00591

Crossref journal-article

American Geophysical Union (AGU)

Reviews of Geophysics (13)

Abstract

A variety of magnetometer systems have been constructed utilizing superconducting quantum interference device (Squid) sensors. The magnetometers have high sensitivity and fast response times and eliminate the need for spinning or vibrating the sample to make measurements. The magnetometers have superconducting sense coils in which a dc persistent current is induced by the insertion of the sample. The current gives, via a flux transformer, a field at the Squid sensor, which is detected as the measure of the magnetization of the sample. The sense coils, the transformer, and the detector are housed within a superconducting shield. It was the advent of the Josephson junction devices which permitted the use of critical currents so small that flux‐switching sensors such as those used in the magnetometers could be developed. The particular Squid used in these magnetometers is an RF‐driven weak link sensor. The magnetometers have been used to observe magnetic transitions to identify magnetic phases. A high‐field susceptometer with a superconducting magnet permits determination of saturation magnetization and magnetic characteristics. Standard paleomagnetic samples can be measured at a magnetic moment sensitivity of 10−8 G cm³. Small samples have been measured with a 3‐mm access system whose noise level is 2 × 10−10 G cm³. Long cores can be measured by using a horizontal open access system. Continuous thermal demagnetization and intensity determinations are being developed.

Bibliography

Goree, W. S., & Fuller, M. (1976). Magnetometers using RFâdriven squids and their applications in rock magnetism and paleomagnetism. Reviews of Geophysics, 14(4), 591â608. Portico.

Authors 2

W. S. Goree (first)
M. Fuller (additional)

References 37 Referenced 120

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10.1126/science.184.4143.1235
10.1109/TMAG.1975.1058697
10.1029/RG013i005p00659
10.1016/0012-821X(75)90166-1
10.1029/JB081i005p00873
{'key': 'e_1_2_1_9_1', 'article-title': 'Intensity determination by continuous thermal cycling', 'author': 'Day R.', 'year': '1976', 'journal-title': 'Phys. Earth Planet. Interiors'} / Phys. Earth Planet. Interiors / Intensity determination by continuous thermal cycling by Day R. (1976)
10.1103/PhysRevLett.7.43
10.1063/1.1720694
{'key': 'e_1_2_1_12_1', 'first-page': '199', 'article-title': 'Experiments using weakly linked superconductors', 'volume': '11', 'author': 'Deaver B.', 'year': '1974', 'journal-title': 'Methods Exp. Phys.'} / Methods Exp. Phys. / Experiments using weakly linked superconductors by Deaver B. (1974)
{'key': 'e_1_2_1_13_1', 'volume-title': 'Introduction to Geophysical Prospecting', 'author': 'Dobrin M. B.', 'year': '1960'} / Introduction to Geophysical Prospecting by Dobrin M. B. (1960)
10.1029/GL001i004p00185
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{'key': 'e_1_2_1_17_1', 'first-page': '21–1', 'volume-title': 'Lectures on Physics', 'author': 'Feynman R.', 'year': '1965'} / Lectures on Physics by Feynman R. (1965)
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Mercereau J. E. Modulated flux flow in superconducting films Proceedings of the Symposium on the Physics of Superconducting Devices chap. 5Rep. 7023 Naval Research Laboratory Washington D.C. 1967.
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{'key': 'e_1_2_1_28_1', 'volume-title': 'Rock Magnetism', 'author': 'Nagata T.', 'year': '1961'} / Rock Magnetism by Nagata T. (1961)
10.1029/JZ069i010p02111
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{'key': 'e_1_2_1_35_1', 'volume-title': 'Experimental Techniques in Low Temperature Physics', 'author': 'White G. K.', 'year': '1968'} / Experimental Techniques in Low Temperature Physics by White G. K. (1968)
10.1016/0012-821X(74)90116-2
10.1190/1.1440524
10.1063/1.1659074

Dates

Type	When
Created	17 years, 7 months ago (Feb. 6, 2008, 9:12 a.m.)
Deposited	1 year, 11 months ago (Sept. 23, 2023, 12:11 a.m.)
Indexed	9 months, 2 weeks ago (Nov. 19, 2024, 11:10 a.m.)
Issued	48 years, 10 months ago (Nov. 1, 1976)
Published	48 years, 10 months ago (Nov. 1, 1976)
Published Online	15 years, 2 months ago (June 14, 2010)
Published Print	48 years, 10 months ago (Nov. 1, 1976)

Funders 0

None

BibTeX

@article{Goree_1976, title={Magnetometers using RF‐driven squids and their applications in rock magnetism and paleomagnetism}, volume={14}, ISSN={1944-9208}, url={http://dx.doi.org/10.1029/rg014i004p00591}, DOI={10.1029/rg014i004p00591}, number={4}, journal={Reviews of Geophysics}, publisher={American Geophysical Union (AGU)}, author={Goree, W. S. and Fuller, M.}, year={1976}, month=nov, pages={591–608} }

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