Precessional switching on perpendicularly magnetized nanodots by picosecond pulse fields

2014 Fiscal Year Final Research Report

• Project/Area Number: 24686038
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Electronic materials/Electric materials
• Research Institution: Tohoku University
• Principal Investigator: KIKUCHI Nobuaki 東北大学, 多元物質科学研究所, 助教 (80436170)
• Co-Investigator(Renkei-kenkyūsha): KITAKAMI Osamu 東北大学, 多元物質科学研究所, 教授 (70250834) ; OKAMOTO Satoshi 東北大学, 多元物質科学研究所, 准教授 (10292278)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 磁化反転 / 磁化ダイナミクス / 磁気記録

Outline of Final Research Achievements

New magnetization reversal methods can be realized by using the effect of magnetization dynamics, in which both magnetization and magnetic field are treated as time dependent terms. In this study, magnetization reversal experiments was carried out based on large angle precessional motion of magnetization produced by applying pulse field normal to the magnetization. Both experiments and calculation results showed that magnetization reversal field can be reduced down to 70 % of that in a static field by using pulse fields with rise time shorter than the relaxation time of magnetization.

Free Research Field

磁性材料・磁気工学