scholarly journals Effects of head field and AC field on magnetization reversal for microwave assisted magnetic recording

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 056505
Author(s):  
Aina Kase ◽  
Fumiko Akagi ◽  
Kazuetsu Yoshida
Keyword(s):  
Magnetic Recording ◽  
Magnetization Reversal ◽  
Microwave Assisted ◽  
Ac Field

Microwave Assisted Magnetization Reversal on Exchange Coupled Composite Media

2014 ◽  
Vol 931-932 ◽  
pp. 1265-1269 ◽  
Author(s):  
Naruemon Wannawong ◽  
Warunee Tipcharoen ◽  
Arkom Kaewrawang
Keyword(s):  
Magnetic Recording ◽  
Magnetization Reversal ◽  
Microwave Field ◽  
Single Layer ◽  
Microwave Frequency ◽  
Areal Density ◽  
Disk Drive ◽  
Microwave Assisted ◽  
Superparamagnetic Limit ◽  
Exchange Coupled Composite

To overcome superparamagnetic limit, microwave assisted magnetic recording (MAMR) is one interesting magnetic recording technology. Therefore, the effect of microwave on magnetization reversal in media should be analyzed. In this work, we propose the MAMR to decrease switching field (coercivity, Hsw) in exchange coupled composite (ECC) media by using the micromagnetic simulation based on the Landau - Lifshitz - Gilbert equation. The Hsw of single layer and ECC media without microwave field is 110.90 and 7.7 kOe, respectively. When the oscillating microwave field is added, Hsw of single layer media with microwave frequency of 2.5 - 40 GHz is lower than 110.90 kOe. Likewise, Hsw of ECC media with microwave frequency of 5 - 16 GHz is lower than 7.7 kOe and has the lowest value of 4.9 kOe at frequency of 10 GHz. The results from this work lead to solve superparamagnetic limit and increase areal density in hard disk drive.

Thin Spin-torque Oscillator With High AC-Field for High Density Microwave-Assisted Magnetic Recording

2013 ◽  
Vol 49 (7) ◽  
pp. 3632-3635 ◽  
Author(s):  
Yo Sato ◽  
Kenji Sugiura ◽  
Masukazu Igarashi ◽  
Katsuro Watanabe ◽  
Yoshihiro Shiroishi
Keyword(s):  
Magnetic Recording ◽  
High Density ◽  
Spin Torque ◽  
Microwave Assisted ◽  
Ac Field

Microwave-assisted magnetic recording at lower transverse oscillating field

2009 ◽  
Vol 105 (7) ◽  
pp. 07B908 ◽  
Author(s):  
Chi-Keong Goh ◽  
Zhi-min Yuan ◽  
Tiejun Zhou ◽  
Li Wang ◽  
Bo Liu
Keyword(s):  
Magnetic Recording ◽  
Microwave Assisted

Microwave-assisted magnetization reversal in 0.36-μm-wide Permalloy wires

2007 ◽  
Vol 91 (12) ◽  
pp. 122505 ◽  
Author(s):  
Y. Nozaki ◽  
K. Tateishi ◽  
S. Taharazako ◽  
M. Ohta ◽  
S. Yoshimura ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Microwave Assisted
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