Method and system for providing a read sensor having a low magnetostriction free layer

US8194365B1 · kind B1 · utility

Assignee

• WESTERN DIGITAL (FREMONT), LLC · US

Inventors

• Qunwen Leng · Palo Alto, US
• Chando Park · San Diego, US
• Yimin Guo · San Jose, US
• Christian Kaiser · San Jose, US
• Mahendra Pakala · San Jose, US
• Sining Mao · Savage, US

Key dates

• Filing date: Sep 3, 2009
• Grant date: Jun 5, 2012
• Expiry date: Aug 6, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N50/85
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and system for providing a magnetic structure in magnetic transducer is described. The magnetic structure includes a pinned layer, a nonmagnetic spacer layer, and a free layer. The nonmagnetic spacer layer is between the pinned layer and the free layer. The free layer includes a first magnetic layer, a second magnetic layer, and a magnetic insertion layer between the first magnetic layer and the second magnetic layer. The first magnetic layer has a first magnetostriction. The second magnetic layer has a second magnetostriction opposite to the first magnetostriction. The magnetic insertion layer provides a growth texture barrier between the first magnetic layer and the second magnetic layer.