TY - JOUR
T1 - Antiferromagnetically coupled patterned media and control of switching field distribution
AU - Ranjbar, Mojtaba
AU - Piramanayagam, S. N.
AU - Suzi, Deng
AU - Aung, Kyaw Oo
AU - Sbiaa, Rachid
AU - Kay, Yew Seng
AU - Wong, Seng Kai
AU - Chong, Chong Tow
N1 - Funding Information:
M. Ranjbar would like to express gratitude for support from the A*STAR (SINGA) Graduate Scholarship program.
PY - 2010/6
Y1 - 2010/6
N2 - Switching Field distribution (SFD) is one of the critical issues for writing in bit patterned media (BPM) for high areal densities. It is believed that the magnetostatic interaction is one of the several factors that contribute to the SFD. With the antiferromagnetically coupled (AFC) structure, the magnetostatic interaction can be tailored to understand/reduce SFD. In this study, AFC patterned media is studied with emphasis placed on the effect of the top layer coercivity, which will determine the Mr and hence the magnetostatic interaction. For this study, nanodots with a size and space of 60 and 40 nm respectively were fabricated with electron beam lithography (EBL). Remanent hysteresis curves for the nanodot arrays were obtained by counting the number of reversed dots in magnetic force microscopy (MFM) images at remanent state. The narrowest SFD at a pressure of 1 Pa for top layer was observed possibly because of good crystaline texture and reduced magnetostatic interaction.
AB - Switching Field distribution (SFD) is one of the critical issues for writing in bit patterned media (BPM) for high areal densities. It is believed that the magnetostatic interaction is one of the several factors that contribute to the SFD. With the antiferromagnetically coupled (AFC) structure, the magnetostatic interaction can be tailored to understand/reduce SFD. In this study, AFC patterned media is studied with emphasis placed on the effect of the top layer coercivity, which will determine the Mr and hence the magnetostatic interaction. For this study, nanodots with a size and space of 60 and 40 nm respectively were fabricated with electron beam lithography (EBL). Remanent hysteresis curves for the nanodot arrays were obtained by counting the number of reversed dots in magnetic force microscopy (MFM) images at remanent state. The narrowest SFD at a pressure of 1 Pa for top layer was observed possibly because of good crystaline texture and reduced magnetostatic interaction.
KW - Antiferromagnetically coupled patterned media
KW - Magnetostatic interactions
KW - Switching field distribution
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U2 - 10.1109/TMAG.2010.2043226
DO - 10.1109/TMAG.2010.2043226
M3 - Article
AN - SCOPUS:77952813684
SN - 0018-9464
VL - 46
SP - 1787
EP - 1790
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 6
M1 - 5467591
ER -