Magnetic material, method for producing the same, and...

Details Magnetic material, method for producing the same, and... Magnetic material, method for producing the same, and...

2006-12-12

2006-12-12

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

C428S842400

Reexamination Certificate

active

07147916

ABSTRACT:
A magnetic material having a structure of a material having a ferromagnetic phase at ordinary temperature as a core and a material having an antiferromagnetic phase at ordinary temperature surrounding the periphery of the core in the form of a shell, wherein a ratio between a volume of the ferromagnetic phase material and the volume of the antiferromagnetic phase material in the magnetic material is in a range where no exchange biasing field of the magnetic material appears and a rotational hysteresis loss of the magnetic material is made the maximum, a method of producing the same, and a magnetic recording medium using the same.

REFERENCES:
patent: 4244932 (1981-01-01), Basile et al.
patent: 6534205 (2003-03-01), Sato et al.
patent: 6830824 (2004-12-01), Kikitsu et al.
Peng et al., “Magnetic properties of monodispersed Co/CoO clusters”, Jan. 2000, Phys. Rev. B, vol. 61, No. 4, pp. 3103-3109.

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