The temperature and electromagnetic field distributions of heat-assisted magnetic recording for bit-patterned media at ultrahigh areal density

2015 ◽  
Vol 117 (17) ◽  
pp. 17C501 ◽  
Author(s):  
K. Pituso ◽  
A. Kaewrawang ◽  
P. Buatong ◽  
A. Siritaratiwat ◽  
A. Kruesubthaworn
Keyword(s):  
Electromagnetic Field ◽  
Magnetic Recording ◽  
Areal Density ◽  
Bit Patterned Media ◽  
Heat Assisted Magnetic Recording ◽  
Patterned Media ◽  
Field Distributions

scholarly journals Micromagnetic Simulation of L10-FePt-Based Exchange-Coupled-Composite-Bit-Patterned Media with Microwave-Assisted Magnetic Recording at Ultrahigh Areal Density

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1264
Author(s):  
Pirat Khunkitti ◽  
Naruemon Wannawong ◽  
Chavakon Jongjaihan ◽  
Apirat Siritaratiwat ◽  
Anan Kruesubthaworn ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Magnetic Domain ◽  
Hysteresis Loops ◽  
Areal Density ◽  
Bit Patterned Media ◽  
Patterned Media ◽  
Microwave Assisted ◽  
The Media ◽  
5 Ghz ◽  
Exchange Coupled Composite

In this work, we propose exchange-coupled-composite-bit-patterned media (ECC-BPM) with microwave-assisted magnetic recording (MAMR) to improve the writability of the magnetic media at a 4 Tb/in2 recording density. The suitable values of the applied microwave field’s frequency and the exchange coupling between magnetic dots, Adot, of the proposed media were evaluated. It was found that the magnitude of the switching field, Hsw, of the bilayer ECC-BPM is significantly lower than that of a conventional BPM. Additionally, using the MAMR enables further reduction of Hsw of the ECC-BPM. The suitable frequency of the applied microwave field for the proposed media is 5 GHz. The dependence of Adot on the Hsw was additionally examined, showing that the Adot of 0.14 pJ/m is the most suitable value for the proposed bilayer ECC-BPM. The physical explanation of the Hsw of the media under a variation of MAMR and Adot was given. Hysteresis loops and the magnetic domain of the media were characterized to provide further details on the results. The lowest Hsw found in our proposed media is 12.2 kOe, achieved by the bilayer ECC-BPM with an Adot of 0.14 pJ/m using a 5 GHz MAMR.

scholarly journals Heat-assisted magnetic recording of bit-patterned media beyond 10 Tb/in2

2016 ◽  
Vol 108 (10) ◽  
pp. 102406 ◽  
Author(s):  
Christoph Vogler ◽  
Claas Abert ◽  
Florian Bruckner ◽  
Dieter Suess ◽  
Dirk Praetorius
Keyword(s):  
Magnetic Recording ◽  
Bit Patterned Media ◽  
Heat Assisted Magnetic Recording ◽  
Patterned Media
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