Magnetic head with an amorphous Hall element

Claim 2

A magnetic head which comprises: a support member having a plane to be faced by a magnetic recording medium; and an amorphous magnetic film which has an axis of easy magnetization along the plane thereof and being arranged on said support member such that a magnetic flux (φ) sent forth from said magnetic recording medium passes through said amorphous magnetic film along said axis of eacy magnetization, said amorphous magnetic film being so biased by a bias current that a first angle (θ) defined by the direction of said axis of easy magnetization and the running direction of said bias current is larger than 0° and smaller than 90°.

Claim 3

A magnetic head which comprises: a support member having a plane to be faced by a magnetic recording medium; an amorphous magnetic film which has an axis of easy magnetization along the plane thereof and being arranged on said support member such that magnetic fluxes sent forth from said magnetic recording medium pass through said amorphous magnetic film along said axis of easy magnetization; a pair of current terminals for conducting a bias current onto said amorphous magnetic film; and a plurality of voltage terminals for providing a plurality of Hall voltages corresponding to said magnetic fluxes emitted from said recording medium; sid current terminals being so positioned that a first angle (θ) defined by the direction of said axis of easy magnetization and the running direction of said bias current is larger than 0° and smaller than 90°.

Claim 4

A magnetic head which comprises: a support member having a plane to be faced by a magnetic recording medium; an amorphous magnetic film which has an axis of easy magnetization along the plane thereof and being arranged on said support member such that magnetic fluxes sent forth from said magnetic recording medium pass through said amorphous magnetic film along said axis of easy magnetization; a pair of current terminals for conducting a bias current onto said amorphous magnetic film; and a plurality of voltage terminals for providing a plurality of Hall voltages corresponding to said magnetic fluxes emitted from said recording medium; sid current terminals being so positioned that a first angle (θ) defined by the direction of said axis of easy magnetization and the running direction of said bias current is larger than 0° and smaller than 90°.

Claim 5

A magnetic head which comprises: a first nonmagnetic member comprising a front plane to be brought into contact with a magnetic recording medium; an amorphous magnetic film which has an axis of easy magnetization along the plane thereof and being arranged in such a prescribed position on said first member that magnetic fluxes issued from said magnetic mediuml pass through said amorphous magnetic film along said axis of easy magnetization; a second nonmagnetic member arranged in a prescribed position on said first member to clamp said amorphous magnetic film with the aid of said first member, a transducing gap for detecting the magnetic fluxes being made to face the junction of said first and second nonmagnetic members; a pair of current terminals for conducting a bias current onto said amorphous magnetic film; and a plurality of voltage terminals for providing a plurality of Hall voltages corresponding to said magnetic fluxes emitted from said recording medium; said current terminals being so positioned that a first angle (θ) defined by the direction of said axis of easy magnetization and the running direction of said bias current is larger than 0° and smaller than 90°.

Claim 6

A magnetic head which comprises: a first nonmagnetic member comprising a front plane to be brought into contact with a magnetic recording medium; an amorphous magnetic film which has an axis of easy magnetization along the plane thereof and being arranged in such a prescribed position on said first member that magnetic fluxes issued from said magnetic mediuml pass through said amorphous magnetic film along said axis of easy magnetization; a second nonmagnetic member arranged in a prescribed position on said first member to clamp said amorphous magnetic film with the aid of said first member, a transducing gap for detecting the magnetic fluxes being made to face the junction of said first and second nonmagnetic members; a pair of current terminals for conducting a bias current onto said amorphous magnetic film; and a plurality of voltage terminals for providing a plurality of Hall voltages corresponding to said magnetic fluxes emitted from said recording medium; said current terminals being so positioned that a first angle (θ) defined by the direction of said axis of easy magnetization and the running direction of said bias current is larger than 0° and smaller than 90°.

Claim 7

The magnetic head of claim 1 or 2, further comprising a ferromagnetic material occupying a prescribed position on said support member such that said amorphous magnetic film is disposed between said ferromagnetic material and the plane facing said recording medium.

Claim 8

The magnetic head of claim 2, wherein said voltage terminals are so disposed that a second angle defined by the running direction of said bias current and a line connecting a given pair of voltage terminals selected from among said voltage terminals is larger than 0° and smaller than 180°.

Claim 9

The magnetic head of claim 3, wherein said voltage terminals are so disposed that a second angle defined by the running direction of said bias current and a line connecting a given pair of voltage terminals selected from among said voltge terminals is larger than 0° and smaller than 180°.

Claim 10

The magnetic head of claim 2, wherein said first angle (θ) is about 45±30°.

Claim 11

The magnetic head of claim 3, wherein said first angle (θ) is about 45±30°.

Claim 12

The magnetic head of claim 5, wherein said second angle is about 90±60°.

Claim 13

The magnetic head of clim 6, wherein said second angle is about 90±60°.

Claim 14

The magnetic head of clim 6, wherein said second angle is about 90±60°.

Claim 15

The magnetic head of any one of claims 1, 2 or 3, wherein said amorphous magnetic film is an alloy containing a rare earth element and transition metal element.

Claim 16

The magnetic head of claim 11, wherein said rare earth element is gadolinium and the content of gadolinium in said alloy accounts for about 15 to about 40 atomic percent.

Claim 17

The magnetic head of claim 11, wherein said transition metal is an element of the iron group.

Claim 18

The magnetic head of any one of claims 1, 2 or 3, wherein said amorphous magnetic film has a thickness less than about 0.2 micron.

Claim 21

The method of claim 15, wherein said amorphous magnetic film is deposited by sputter.

Claim 22

The method of claim 15, wherein said amorphous magnetic film is formed by vacuum thermal deposition, by electron beam heating.

Claim 23

The method of claim 15, comprising forming said amorphous magnetic film while rotating said first insulation block.

Claim 25

The method of claim 19, wherein the prescribed angle is about 60°.

Claim 26

A magnetic head manufactured by the method of any one of claims 15, 16, 17 or 18.

Claim 27

A magnetic head manufactured by the method of claim 19.