Seagate Technology Incorporated

Douglas A Saunders

Erli Chen

Zheng Gao

Riyan Alex Mendonsa

Sining Mao

James H McGlennen

Pu-Ling Lu

Juan Jose Fernandez-de-Castro

Lujun Chen

Paul Kolbo

Bits are written to a track of a heat-assisted magnetic recording medium via a write transducer at a first skew angle. The track is read via a read transducer oriented at a second skew angle different from the first skew angle. The second skew angle causes the read transducer be more closely aligned with boundaries of the bits than if oriented at the first skew angle.

Reading and writing to a HAMR recording medium at different skew angles

A read sensor for use in a magnetic read head includes a magnetoresistive stack having a plurality of layers, and first and second shield regions positioned adjacent to the magnetoresistive stack. Each of the shield regions includes a first soft magnetic layer for shunting flux from an adjacent track to the shield region instead of the magnetoresistive stack.

Magnetoresistive sensor with reduced side-reading effect

Side-reading of an abutted-junction magnetic transducer is measured by constructing at least one microtrack having a transition density. The transducer is moved relative to the microtrack to identify a plurality of positions of the transducer relative to the microtrack where the transducer provides a predetermined response. The side-reading distance of the transducer is identified from the plurality of positions. In one embodiment, a plurality of microtracks are constructed during different iterations, each having a different transition density, and the positions of the transducer are identified during each iteration relative to the respective microtrack. In another embodiment, the selected transition density has a fundamental frequency, and the position of the transducer is identified relative to the microtrack where the transducer provides the predetermined response at each of a plurality of harmonic frequencies of the fundamental frequency.

Process of measuring slide-reading of abutted-junction read heads

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Lakeville, MN, United States of America

Douglas A Saunders