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JPS57132072A - Absolute fluxmeter of superconduction quantum interference - Google Patents

Absolute fluxmeter of superconduction quantum interference

Info

Publication number
JPS57132072A
JPS57132072A JP56016890A JP1689081A JPS57132072A JP S57132072 A JPS57132072 A JP S57132072A JP 56016890 A JP56016890 A JP 56016890A JP 1689081 A JP1689081 A JP 1689081A JP S57132072 A JPS57132072 A JP S57132072A
Authority
JP
Japan
Prior art keywords
magnetic flux
josephson
fine particles
reduced
metallic fine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56016890A
Other languages
Japanese (ja)
Inventor
Tsutomu Yamashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOUHOKU KINZOKU KOGYO KK
Tokin Corp
Original Assignee
TOUHOKU KINZOKU KOGYO KK
Tohoku Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TOUHOKU KINZOKU KOGYO KK, Tohoku Metal Industries Ltd filed Critical TOUHOKU KINZOKU KOGYO KK
Priority to JP56016890A priority Critical patent/JPS57132072A/en
Publication of JPS57132072A publication Critical patent/JPS57132072A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • G01R33/0354—SQUIDS

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Superconductor Devices And Manufacturing Methods Thereof (AREA)

Abstract

PURPOSE:To realize the absolute measurement of magnetic flux, by using Josephson elements which have the superconduction properties to be reduced for every invasion of the magnetic flux quantum and gives an incomplete period answer to the magnetic flux. CONSTITUTION:A number of superconductive metallic fine particles 1 are formed on a substrate 2, and a spot connection is given to the particles 1. Then the surface of each particle is oxidized to obtain an oxidized film. Furthermore, the similar metallic fine particles are formed on the oxidized film. This operation is repeated to obtain a 2-dimentional or 3-dimentional Josephson distribution circuit network containing Josephson elements 3 between the metallic fine particles. Then an external magnetic field phie is applied to a reticular equivalence circuit consisting of a Josephson element J and an inductance L. As a result, the superconduction properties of the distribution circuit network is reduced with every invasion of the magnetic flux quantum. Accordingly the stabilized state is reduced with increment of the magnetic flux quantum number (n). Thus the AC magnetic flux phirf and the DC magnetic flux phiDC are applied from an LC resonance circuit to detect phiDC=0.
JP56016890A 1981-02-09 1981-02-09 Absolute fluxmeter of superconduction quantum interference Pending JPS57132072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56016890A JPS57132072A (en) 1981-02-09 1981-02-09 Absolute fluxmeter of superconduction quantum interference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56016890A JPS57132072A (en) 1981-02-09 1981-02-09 Absolute fluxmeter of superconduction quantum interference

Publications (1)

Publication Number Publication Date
JPS57132072A true JPS57132072A (en) 1982-08-16

Family

ID=11928753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56016890A Pending JPS57132072A (en) 1981-02-09 1981-02-09 Absolute fluxmeter of superconduction quantum interference

Country Status (1)

Country Link
JP (1) JPS57132072A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001025805A1 (en) * 1999-10-04 2001-04-12 Nils Schopohl Device for high resolution measurement of magnetic fields
WO2015173354A1 (en) * 2014-05-13 2015-11-19 Thales Superconducting component and associated amplifier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANS. MAGNETICS=1979 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001025805A1 (en) * 1999-10-04 2001-04-12 Nils Schopohl Device for high resolution measurement of magnetic fields
US6690162B1 (en) 1999-10-04 2004-02-10 Qest Quantenelektronische Systeme Device for high-resolution measurement of magnetic fields
WO2015173354A1 (en) * 2014-05-13 2015-11-19 Thales Superconducting component and associated amplifier
FR3021118A1 (en) * 2014-05-13 2015-11-20 Thales Sa SUPERCONDUCTING COMPONENT, AMPLIFIER

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