Role of Intergrain and Intragrain Coupling on Switching Field of Granular Exchange Coupled Composite Media Using Microwave Assisted Magnetic Recording

Naruemon Wannawong; Arkom Kaewrawang; Kotchakorn Pituso; Warunee Tipcharoen; Apirat Siritaratiwat

doi:10.4028/www.scientific.net/AMM.781.211

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 781Role of Intergrain and Intragrain Coupling on...

Role of Intergrain and Intragrain Coupling on Switching Field of Granular Exchange Coupled Composite Media Using Microwave Assisted Magnetic Recording

Abstract:

Microwave assisted magnetic recording is one interesting magnetic recording technology to improve writability for high areal density of hard disk drive. In this work, the role of intergrain and intragrain coupling and microwave field is investigated by micromagnetic simulation based on the Landau - Lifshitz - Gilbert equation. The results show that the switching field, H_sw, of media with microwave field, H_ac, of 10 GHz is lower than that for media without H_ac. The exchange coupling between nearest neighbor grains hardly affects the H_sw of media and slightly affects the slope of hysteresis loop. In addition, the slope of hysteresis loops and H_sw decrease with increasing exchange coupling in each grain. The results from this work can lead to obtain the improvement writability and increasing areal density of hard disk drive.

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Periodical:

Applied Mechanics and Materials (Volume 781)

Pages:

211-214

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.781.211

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Online since:

August 2015

Authors:

Naruemon Wannawong, Arkom Kaewrawang*, Kotchakorn Pituso, Warunee Tipcharoen, Apirat Siritaratiwat

Keywords:

ECC Media, Hard Disk Drive, Microwave Assisted Magnetic Recording

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