Seagate Technology Incorporated

Taras Grigoryevich Pokhil

Victor Sapozhnikov

Mohammed Sharia Ullah Petwari

Declan Macken

Nurul Amin

Patrick Joseph Ryan

Olle Gunnar Heinonen

Shaun Eric McKinlay

Mohammed Shariat Ullah Patwari

Ned Tabat

Johannes Van Ek

Mohammed Sharia Ullah Patwari

Martin Louis Plumer

Andrzej Adam Stankiewicz

Pu-Ling Lu

Chunhong Hou

Steven Paul Bozeman

Gavin Lee Brinkley

Steven Kalderon

Janusz Jozef Nowak

Alexandar Mikhailovich Shukh

A reader includes a free layer and a side shield that biases the free layer. The side shield includes a main bias layer having a first magnetic moment value and a first magnetization direction. The side shield also includes a compensation bias layer having a second magnetic moment value that is less than the first magnetic moment value and a second magnetization direction that is opposite to the first magnetization direction.

Reader with bi-layered side shields

An apparatus disclosed herein comprises a magnetically free layer and a bottom shield, wherein a first portion of the bottom shield substantially adjacent the free layer is pinned perpendicular to an air-bearing surface (ABS) of the apparatus and a second portion of the bottom shield not substantially adjacent the free layer is pinned parallel to the ABS of the apparatus.

Magnetoresistive sensor

An apparatus comprising a base shield, a sensor stack, and a base seed layer separating the base shield from the sensor stack. The base seed layer has a base coupled seed section that is coupled with the base shield, and a base uncoupled seed section that is uncoupled with the base shield, wherein the base uncoupled seed section covers a base window surrounding the sensor stack.

Reader with decoupled magnetic seed layer

An apparatus comprising a base shield and a sensor stack, wherein the base shield is separated from the sensor stack via a first soft magnetic layer that is magnetically decoupled form the base shield.

The present invention relates to a head having an air bearing surface for confronting the surface of a storage medium. The head includes a first pole that is spaced apart from a second pole. At least one non-magnetic spacer is positioned between the first pole and the second pole such that the first pole is magnetically decoupled from the second pole. In a further aspect, one or both of the first pole and the second pole can be elliptical in shape.

Recording head for reducing side track erasure

A transducing head includes at least three magnetic layers. At least two of these magnetic layers function as shields of a reader portion of the transducing head, and at least one of these magnetic layers functions as a pole of a writer portion of the transducing head. Importantly, at least one of the three magnetic layers is formed of a thin film structure having a first and a second ferromagnetic layer, a nonmagnetic spacer layer, and a bias layer. The spacer layer is positioned between the first and the second ferromagnetic layers. The bias layer is positioned adjacent the first ferromagnetic layer. The second ferromagnetic layer has a thickness-magnetic moment product substantially equal to a thickness-magnetic moment product of the first ferromagnetic layer. An easy axis of the second ferromagnetic layer is substantially parallel to an easy axis of the first ferromagnetic layer.

Single domain state laminated thin film structure for use as a magnetic layer of a transducing head

A magnetoresistive stack for use in a magnetic read head has a plurality of layers including a ferromagnetic free layer, a ferromagnetic pinned layer, and an antiferromagnetic pinning layer. The pinned layer and pinning layer each have a greater number of structural grains than the free layer, which decreases a fluctuation of magnetization in the magnetoresistive stack without decreasing a spatial resolution of the magnetoresistive stack.

Magnetoresistive sensor with oversized pinned layer

Growing community of inventors

Arden Hills, MN, United States of America

Taras Grigoryevich Pokhil