GRANULAR SUBSTANCE, MAGNETIC THIN FILM, AND MAGNETIC DEVICE

Title:

GRANULAR SUBSTANCE, MAGNETIC THIN FILM, AND MAGNETIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2004/061876

Kind Code:

A1

Abstract:

A granular substance (1) having a soft magnetic characteristic. The granular substance (1) contains a matrix (3) of a nonmagnetic insulating organic material and ferromagnetic metallic particles (2) dispersed in the matrix (3) and having an average diameter of 50 nm or less. The volume ratio of the matrix (3) ranges from 5 to 50%. When the granular substance (1) is formed into a thin film, the film exhibits a complex permeability the real part (μ’) of which is 40 or more at 1 GHz, a performance index Q (Q=μ’/μ” where μ” is the imaginary part of the complex permeability) of 1 or more, and a saturation magnetization of 5 kG or more.

Inventors:

CHOI KYUNG-KU (JP)
MURASE TAKU (JP)
HIRATSUKA NOBUYUKI (JP)
KAKIZAKI KOUICHI (JP)

Application Number:

PCT/JP2003/016097

Publication Date:

July 22, 2004

Filing Date:

December 16, 2003

Export Citation:

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Assignee:

TDK CORP (JP)
CHOI KYUNG-KU (JP)
MURASE TAKU (JP)
HIRATSUKA NOBUYUKI (JP)
KAKIZAKI KOUICHI (JP)

International Classes:

H01F10/00; (IPC1-7): H01F10/16

Foreign References:

JPH06140687A	1994-05-20
JPH10308320A	1998-11-17
JPH0935927A	1997-02-07
JPH10241935A	1998-09-11

Other References: