Susceptometer and process for determining magnetic susceptibility
AssigneeThe United States of America as represented by the Secretary of Commerce
InventorDaniel B. GOPMAN, IV
Life of this patent
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Abstract
A susceptometer includes: a substrate; a plurality of electrodes including: a first pair of electrodes disposed on the substrate; a second pair of electrodes disposed on the substrate, the second pair of electrodes arranged collinear with the first pair of electrodes to form a set of aligned electrodes; and a third pair of electrodes disposed on the substrate, the third pair of electrodes arranged noncollinearly with set of aligned electrodes; and a solenoid circumscribingly disposed around the electrodes to: receive the sample such that the solenoid is circumscribingly disposed around the sample; receive an alternating current and produce an primary magnetic field based on the alternating current; and subject the sample to the primary magnetic field.
Claims20
A susceptometer comprising:
- a substrate;
- a plurality of electrodes to:
- subject a sample to a direct current electrical current;
- and
- measure at least one of a Hall voltage of the sample or a current-in-plane resistance of the sample,
- the plurality of electrodes comprising:
- a first pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample;
- a second pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the second pair of electrodes arranged collinear with the first pair of electrodes to form a set of aligned electrodes;
- and
- a third pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the third pair of electrodes arranged noncollinearly with the set of aligned electrodes;
- and
- a solenoid circumscribingly disposed around the electrodes to:
- receive the sample such that the solenoid is circumscribingly disposed around the sample;
- receive an alternating current and produce a primary magnetic field based on the alternating current;
- and
- subject the sample to the primary magnetic field.
A susceptometer to perform magnetic susceptometry on a sample, the susceptometer comprising:
- a chamber;
- a substrate disposed in the chamber;
- a plurality of electrodes disposed in the chamber and being electrically reconfigurable in-situ and in contact with the sample to obtain reconfigurably the Hall voltage of the sample and the current-in-plane resistance of the sample and to subject the sample to a direct current electrical current,
- the plurality of electrodes comprising:
- a first pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample;
- a second pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the second pair of electrodes arranged collinear with the first pair of electrodes to form a set of aligned electrodes;
- and
- a third pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the third pair of electrodes arranged noncollinearly with set of aligned electrodes;
- and
- a fourth pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the fourth pair of electrodes arranged noncollinearly with set of aligned electrodes and arranged in a square pattern with the third pair of electrodes;
- and
- a solenoid disposed in the chamber and circumscribingly disposed around the electrodes to:
- receive the sample such that the solenoid is circumscribingly disposed around the sample;
- receive an alternating current and produce a primary magnetic field based on the alternating current;
- and
- subject the sample to the primary magnetic field.
A process for performing magnetic susceptometry on a sample, the process comprising:
- providing the sample to a susceptometer comprising:
- a substrate;
- a plurality of electrodes comprising:
- a first pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample;
- a second pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the second pair of electrodes arranged collinear with the first pair of electrodes to form a set of aligned electrodes;
- and
- a third pair of electrodes disposed on the substrate and being electrically conductive to engage and be in electrical contact with the sample, the third pair of electrodes arranged noncollinearly with set of aligned electrodes;
- and
- a solenoid circumscribingly disposed around the electrodes;
- receiving the sample in the solenoid such that the solenoid is circumscribingly disposed around the sample;
- providing the solenoid with an alternating current;
- producing, by the solenoid, a primary magnetic field in response to receiving the alternating current;
- subjecting the sample to the primary magnetic field;
- and
- subjecting the sample to a direct current electrical current to perform magnetic susceptometry.
Dependencies are inferred from the claim text.