Magnetic-field sensor device

Details Magnetic-field sensor device Magnetic-field sensor device

2005-05-24

2005-05-24

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Magnetometers

C428S323000, C428S336000

Reexamination Certificate

active

06897650

ABSTRACT:
A magnetic-field sensor device comprises at least two electrodes; an insulating layer separating the at least two electrodes; at least one layer of chemically-synthesized magnetic nanoparticles disposed at or above a level with the insulating layer, and disposed between the at least two electrodes; and an organic spacer surrounding each of the chemically-synthesized magnetic nanoparticles. A deviation between diameters of different ones of the nanoparticles is less than 15%. Moreover, the chemically-synthesized magnetic nanoparticles range in size between 2 nm and 20 nm in diameter.

REFERENCES:
patent: 4063000 (1977-12-01), Aonuma et al.
patent: 6162532 (2000-12-01), Black et al.
Inomata et al. “Spin- dependent tunneling layered ferromagnetic Nenoparticles” Applied Physcis Letters vol. 73,# 8 Aug. 24, 1998.*
K. Nakajima et al., “Magnetoresistance Oscillations in Double Ferromagnetic Tunnel Junctions with Layered Ferromagnetic Nanoparticles”, IEEE Transactions on Magnetics, vol. 36, No. 5, 2000, pp. 2806-2808.

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