A data writer may be generally configured at least with a write pole that has a pole sidewall and a continuous first taper angle connecting leading and trailing edges. The write pole can be positioned adjacent to a side shield that is configured with first and second shield sidewalls tapered to a shield tip that is the closest point between the write pole and side shield.

L'invention concerne un dispositif de lecture magnétique comportant : une tête de lecture magnétique (31) comprenant un premier enroulement conducteur (45) ; et un second enroulement conducteur (55) connecté en opposition de phase au premier enroulement.

An apparatus can be generally directed to a magnetic stack having a magnetically free layer positioned on an air bearing surface (ABS). The magnetically free layer can be biased to a predetermined magnetization in various embodiments by a biasing structure that is coupled with the magnetically free layer and positioned distal the ABS.

An apparatus can be generally directed to a magnetic stack having a magnetically free layer positioned on an air bearing surface (ABS). The magnetically free layer can be biased to a predetermined magnetization in various embodiments by a biasing structure that is coupled with the magnetically free layer and positioned distal the ABS.

A perpendicular recording write head has ferromagnetic first and second pole pieces which are connected at a back gap and an insulation stack with a write coil layer embedded therein is located between the first and second pole pieces and between a head surface of the write head and the back gap. The second pole piece has a pole tip which is located at the head surface and a recessed ferromagnetic write shield layer. A nonmagnetic isolation layer is located between the second pole piece and the write shield layer and at least one ferromagnetic stud is magnetically connected between the first pole piece layer and the write shield layer and is located between the head surface and the insulation stack.

The invention is a method for reactive sputter deposition of an ultra-thin film of an oxide of a first metal onto a film of a second metal. The method can be part of the fabrication of a magnetic tunnel junction (MTJ) with the metal oxide film becoming the tunnel barrier of the MTJ. The metal oxide film is reactively sputter deposited in the presence of reactive oxygen gas (O ₂ ) from a target consisting essentially of the first metal, with the sputtering occurring in the "high-voltage" state to assure that deposition occurs with the target in its metallic mode, i.e., no or minimal oxidation of the target. When the metal oxide film is for a MTJ tunnel barrier, then the target is formed of a metal of Mg, Al, Ti, Ta, Y, Ga or In; an alloy of two or more of these metals; or an alloy of one or more of these metals with Mg; and the film of the second metal is an iron-containing film, typically a film of Fe or a CoFe alloy.

There is provided a magnetic head (1) capable of efficiently carrying out a recording or reproducing operation even in the case of a shorter magnetic path length and a shorter wavelength signal. The magnetic head (1) comprises: a pair of magnetic bodies (2a,2b) including respective first and second medium facing surfaces (3), respective first and second rear surfaces opposite to the medium facing surfaces, and respective inner side surfaces, the inner side surfaces facing each other; and a magnetic gap (4) disposed between the inner side surfaces and including third medium (3) facing surface coplanar with the first and the second medium facing surfaces and third rear surface coplanar with the first and second rear surfaces; one of the inner side surfaces satisfying relationships of

• x = G1/2 with respect to 0 ≦ y ≦ TH, and
• 0.1 · tan{2(x-G1/2)} + TH ≦ y ≦ 5 · tan(2(x-G1/2)) +
• TH with respect to TH ≦ y

A magnetic head unit (1) is provided in which the distance (L) between a surface of the gimbal plate (4) put touching the pressing member (52) and a surface of the magnetic head (5) facing the first or second disc-shaped recording medium is set to fall in a range of 0.3 to 0.8 mm and thus the coil winding cavity (14) can be formed in the intermediate portion of the magnetic head (5) in the direction of the head thickness and the magnetic heads (5) can be kept stably in place in relation to the disc-shaped recording medium. Also, a recording and/or reproducing apparatus (60) using the magnetic head unit is provided.