Electricity: measuring and testing – Magnetic – Magnetic information storage element testing
Patent
1994-02-23
2000-06-27
Patidar, Jay
Electricity: measuring and testing
Magnetic
Magnetic information storage element testing
324244, 250306, G01R 3312, G01R 3302
Patent
active
060811137
ABSTRACT:
A magnetic force sensor for detecting a magnetic force of a magnetic sample having a given magnetization direction comprises a magnetic probe having a tip portion. The tip portion is coated with a film of hard-magnetic material effective to maintain the magnetization direction of the probe constant and parallel to the given magnetization direction of the sample. A biasing member has the magnetic probe attached thereto at a free end thereof and is resiliently deflectable in response to the magnetic force between the magnetic probe and the magnetic sample. When the magnetic probe is scanned across the magnetic sample, the distribution of the magnetic force on the magnetic sample is effectively detected.
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Grutter et al, "Batched Fabricated Sensors for magnetic force microscopy", Oct. 1990, American Inst. of Physics, pp. 1820-1822.
Moriya Naoto
Tomita Eisuke
Patidar Jay
Seiko Instruments Inc.
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