| 摘要 |
Described herein is a magnetoresistive network responsive to a magnetic field (H ext , H p ) of the type comprising a plurality of magnetoresistive elements (10; 20; 30). According to the invention, the one or more magnetoresistive elements (10; 20; 30) comprise at least one magnetoresistive element in the form of nanoconstriction (10; 20; 30), said nanoconstriction (10; 20; 30) comprising at least two pads (12, 13; 22, 23) made of magnetic material, associated to which are respective magnetizations (16, 17; M 1 , M 2 ) oriented in directions substantially opposite to one another and connected through a nanochannel (11; 21), said nanochannel (11; 21) being able to set up a domain wall (15; 25) that determines an electrical resistance (R) of said nanoconstriction (10; 20; 30) as a function of the position, with respect to said nanochannel (11; 21), of said domain wall (15; 25) formed in said sensor device.
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