TY - JOUR
T1 - Requirements for soft magnetic underlayer (SUL) - Micromagnetic simulations of single-pole-type write heads and sul systems
AU - Kanai, Yasushi
AU - Jinbo, Yoshihiro
AU - Koyama, Kazuya
AU - Yoshida, Kazuetsu
AU - Greaves, Simon
AU - Muraoka, Hiroaki
N1 - Funding Information:
This work was supported in part by a Grant in Aid for the Japan Society for the Promotion of Science ( #21,560,374 ) and SRC, Japan.
PY - 2012/2
Y1 - 2012/2
N2 - LandauLifshitzGilbert micromagnetic models were used to analyze the head field distributions and high-frequency responses for various soft magnetic underlayer thicknesses (t-SUL) and saturation magnetization flux densities (Bs) of single-pole-type (SPT) headSUL systems. It was found that Bs of 1012 kG and t-SUL of 3045 nm would be sufficient for the examined head and perhaps for most next generation headSUL systems. Antiferromagnetic coupling in the SUL affects the head and SUL magnetization and, eventually, the head field. With regard to the head magnetization response, it was found that the magnetization under the coil responded first, while the response at the main pole tip was quite slow, even compared with the head field. The main pole tip of the head was fully saturated and the main pole yoke was almost saturated, while the SUL was not saturated in the examined headSUL system.
AB - LandauLifshitzGilbert micromagnetic models were used to analyze the head field distributions and high-frequency responses for various soft magnetic underlayer thicknesses (t-SUL) and saturation magnetization flux densities (Bs) of single-pole-type (SPT) headSUL systems. It was found that Bs of 1012 kG and t-SUL of 3045 nm would be sufficient for the examined head and perhaps for most next generation headSUL systems. Antiferromagnetic coupling in the SUL affects the head and SUL magnetization and, eventually, the head field. With regard to the head magnetization response, it was found that the magnetization under the coil responded first, while the response at the main pole tip was quite slow, even compared with the head field. The main pole tip of the head was fully saturated and the main pole yoke was almost saturated, while the SUL was not saturated in the examined headSUL system.
KW - Micromagnetic simulation
KW - Perpendicular magnetic recording
KW - Recording write heads
KW - Soft magnetic underlayer (SUL)
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U2 - 10.1016/j.jmmm.2010.12.016
DO - 10.1016/j.jmmm.2010.12.016
M3 - Article
AN - SCOPUS:80053584016
VL - 324
SP - 282
EP - 286
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 3
ER -