Patent ID: 8315013
Filing Date: 2012-11-20
Classification: G11B

Abstract:
1. A magnetic head comprising: a yoke having a first pole, a second pole, and a first magnetic connection between the first and second poles at a first end of the poles, and a non-magnetic gap between the poles at a second end of the poles; a coil having one or more turns wrapped around the magnetic yoke; and a first magnetic structure proximate to the first pole of the yoke, wherein the structure diverts magnetic flux from an external magnetic source; said first magnetic structure having a second magnetic connection to the yoke at a first end of the poles, and a first non-magnetic separation from the yoke at the second end of the poles; wherein the reluctance between said first magnetic structure and the yoke proximate to the second magnetic connection is less than the reluctance between said structure and the yoke through the first non-magnetic separation from the yoke proximate to the second end of the poles; and wherein the reluctance proximate to the first non-magnetic separation is higher than the reluctance through the non-magnetic gap at the second end of the poles.