Magnetic detecting element utilizing magnetic impedance effect
First Claim
Patent Images
1. A magnetic detecting element utilizing a magnetic impedance effect comprising:
- (a) a non-magnetic substrate;
(b) a high-permeability magnetic film formed on said non-magnetic substrate and having magnetic anisotropy in a predetermined direction in a plane of said magnetic film, said high-permeability magnetic film being formed of one of a Fe--Co--B based amorphous film, a Fe--N based film and a Fe--C based film, said high-permeability magnetic film further having a plurality of straight portions which are arranged at predetermined intervals along a direction perpendicular to the direction of the magnetic anisotropy and interconnected to be sequentially folded;
(c) applying means for applying a high-frequency current across two points in a direction perpendicular to the direction of the magnetic anisotropy; and
(d) output means for converting a change in impedance generated between the two points into an electric signal and outputting the electric signal.
1 Assignment
0 Petitions
Accused Products
Abstract
In a magnetic detecting element utilizing a magnetic impedance effect, a high-permeability magnetic film is formed on a non-magnetic substrate and has magnetic anisotropy in a predetermined direction in the plane of the magnetic film. A high-frequency current is applied across two points in a direction perpendicular to the direction of the magnetic anisotropy, and a change in impedance generated between the two points is converted into an electric signal to obtain an output.
-
Citations
18 Claims
-
1. A magnetic detecting element utilizing a magnetic impedance effect comprising:
-
(a) a non-magnetic substrate; (b) a high-permeability magnetic film formed on said non-magnetic substrate and having magnetic anisotropy in a predetermined direction in a plane of said magnetic film, said high-permeability magnetic film being formed of one of a Fe--Co--B based amorphous film, a Fe--N based film and a Fe--C based film, said high-permeability magnetic film further having a plurality of straight portions which are arranged at predetermined intervals along a direction perpendicular to the direction of the magnetic anisotropy and interconnected to be sequentially folded; (c) applying means for applying a high-frequency current across two points in a direction perpendicular to the direction of the magnetic anisotropy; and (d) output means for converting a change in impedance generated between the two points into an electric signal and outputting the electric signal. - View Dependent Claims (2, 3)
-
-
4. A magnetic detecting element utilizing a magnetic impedance effect, characterized in that:
-
said magnetic detecting element is constituted by forming a high-permeability magnetic film on a non-magnetic substrate; said high-permeability magnetic film is formed to have a zigzag pattern having a plurality of straight portions along a magnetic field detection direction which are arranged in parallel at predetermined intervals and interconnected to be sequentially folded and to be electrically connected in series with each other, and has magnetic anisotropy such that an easy direction of magnetization is perpendicular to the magnetic field detection direction in a plane of said high-permeability magnetic film; a high-frequency current is applied from both end portions of said high-permeability magnetic film; and a change in impedance generated by an external magnetic field between both the end portions of said high-permeability magnetic film is converted into an electric signal to obtain an output. - View Dependent Claims (5, 6, 7)
-
-
8. A magnetic head for reproduction utilizing a magnetic impedance effect, characterized in that:
-
said magnetic head is constituted by forming first and second high-permeability magnetic films on a surface, of a non-magnetic substrate having an end surface formed as a magnetic recording medium sliding surface, substantially perpendicular to the sliding surface; said first high-permeability magnetic film is formed to have a zigzag pattern having a plurality of straight portions along a direction perpendicular to the sliding surface which are arranged at a distance from the sliding surface and in parallel at predetermined intervals and interconnected to be sequentially folded and to be electrically connected in series with each other, and has magnetic anisotropy such that an easy direction of magnetization is substantially parallel to the sliding surface in a plane of said first high-permeability magnetic film; said second high-permeability magnetic film is formed to overlap folded portions of the zigzag pattern of said first high-permeability magnetic film on the side of the sliding surface through an insulating film and to extend up to the sliding surface; a high-frequency current is applied from both end portions of said first high-permeability magnetic film; and a change in impedance generated between both the end portions of said first high-permeability magnetic film by a magnetic field applied from a magnetic recording medium to said first high-permeability magnetic film through said second high-permeability magnetic film is converted into an electric signal to obtain a reproduction output. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A magnetic detecting element utilizing a magnetic impedance effect, characterized in that:
-
said magnetic detecting element is constituted by forming a high-permeability magnetic film on a non-magnetic substrate; said high-permeability magnetic film is formed to have a zigzag pattern having a plurality of straight portions along a magnetic field detection direction which are arranged in parallel at predetermined intervals and interconnected to be sequentially folded and to be electrically connected in series with each other, and has magnetic anisotropy such that an easy direction of magnetization is perpendicular to the magnetic field detection direction in a plane of said high-permeability magnetic film; a substantially rectangular high-permeability magnetic film formed on the zigzag pattern of said high-permeability magnetic film; a high-frequency current is applied from both end portions of said high-permeability magnetic film having said zigzag pattern; and a change in impedance generated by an external magnetic field between both the end portions of said high-permeability magnetic film having said zigzag pattern is converted into an electric signal to obtain an output. - View Dependent Claims (16, 17, 18)
-
Specification