Electricity: measuring and testing – Magnetic – Magnetometers
Reexamination Certificate
2006-08-30
2009-11-10
Patidar, Jay M (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetometers
C324S249000, C977S960000
Reexamination Certificate
active
07615995
ABSTRACT:
A thin-film device for detecting the variation of intensity of physical quantities, in particular a magnetic field, in a continuous way, comprises an electrical circuit including one or more sensitive elements, which are designed to vary their own electrical resistance as a function of the intensity of a physical quantity to be detected. One or more of the sensitive elements comprise at least one nanoconstriction, and the nanoconstriction comprises at least two pads made of magnetic material, associated to which are respective magnetizations oriented in directions substantially opposite to one another and connected through a nanochannel. The nanochannel is able to set up a domain wall that determines the electrical resistance of the nanoconstriction as a function of the position, with respect to the nanochannel, of the domain wall formed in the sensor device. At least one cross section of the nanochannel is configured so as to present a variable extension along one or more axes as a function of different values of the physical quantity to be detected.
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J. M. D. Coey, Non-volatile magnetoresistive structure for use in computer, has nanoconstrictions or nanocontacts of similar or different dimensions provided between films; IE 82101 B3; Feb. 6, 2002, pp. 1-4.
Innocenti Gianfranco
Pullini Daniele
Repetto Piermario
Ruotolo Antonio
C.R.F. Società Consortile per Azioni
Nixon & Vanderhye P.C.
Patidar Jay M
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