Magnetic sensor having optimal free layer back edge shape and extended pinned layer

摘要

A magnetic read sensor having an extended pinned layer and having a free layer structure with a back edge formed at an angle for optimizing sensor performance and pinned layer pinning. The magnetic free layer has a back edge that is formed at an angle of between 6 and 10 degrees relative to a plane parallel with the air bearing surface plane. The magnetic sensor can be formed by forming the free layer stripe height with an ion milling that is performed at an angle of 6 to 10 degrees relative to normal.

主权项

1. A magnetic sensor, comprising:
a magnetic free layer structure that extends from an air bearing surface to a first stripe height as measured from the air bearing surface and having a back edge opposite the air bearing surface that is formed at an angle of 6 to 10 degrees with respect to a plane parallel with the air bearing surface; a magnetic pinned layer structure that extends beyond the first stripe height; and a non-magnetic layer sandwiched between the magnetic free layer structure and the magnetic pinned layer structure.