Thin film with tuned grain size

摘要

An apparatus and associated method provides a magnetic writing element that may have at least a write pole tuned to a predetermined first grain size with a cryogenic substrate temperature. A magnetic shield can be formed with a predetermined second grain size that is tuned with the cryogenic substrate temperature.

主权项

1. A data storage device comprising a write pole having a first grain size and contacting a magnetic shield having a second grain size, the magnetic shield contacting a substrate having a temperature of less than 100 K, the first grain size corresponding with a magnetic moment of approximately 2.4 T, an easy axis magnetic coercivity of approximately 8 Oe, a hard axis magnetic coercivity of less than 1 Oe, and a uniaxial anisotropy of approximately 23.