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US 6,583,619 B2Granted
Squid microscope
AssigneeForschungszentrum Julich GmbH
InventorsEgon Zimmermann, Helmut Soltner, Walter Glaas, Horst Halling, Mikkail Faley
Life of this patent
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Abstract
In order to measure magnetic characteristics of a sample, the latter is positioned above the SQUID so that both the SQUID and the sample are supported in a vessel in a gaseous nitrogen space above a liquid nitrogen coolant so that the measurement can take place at ambient pressure and in a nitrogen atmosphere.
Claims14
A method of measuring magnetic characteristics of a sample, comprising the steps of:
- (a) cooling a SQUID to a superconducting temperature enabling said SQUID to respond to magnetic characteristics of said sample;
- (b) juxtaposing said SQUID at said superconducting temperature and the sample in a protective gas atmosphere at ambient pressure in an upwardly open vessel, said protective gas atmosphere preventing deposit of undesirable components on the SQUID or sample;
- and
- (c) effecting a measurement with said SQUID at superconducting temperature of a magnetic property of said sample in said protective gas atmosphere at said ambient pressure.
1 more element
A SQUID microscope for measuring magnetic characteristics of a sample, comprising:
- an upwardly open vessel;
- a SQUID holder in said vessel configured to cool a SQUID to a superconducting temperature enabling said SQUID to respond to magnetic characteristics of said sample;
- a SQUID mounted on said SQUID holder in said vessel and adapted to be cooled to said superconducting temperature enabling said SQUID to respond to magnetic characteristics of said sample;
- and
- a sample holder in said vessel carrying a sample juxtaposing said sample and with said SQUID in a protective gas atmosphere at ambient pressure whereby measurement of a magnetic property of said sample can be effected with said SQUID at said superconducting temperature in said protective gas atmosphere at said ambient pressure, said protective gas atmosphere preventing deposit of undesirable components on said SQUID and said sample.
2 more elements
Dependencies are inferred from the claim text.