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2010.1<strong>2.</strong>222011.01.05磁 性 纳 米 结 构 的 超 快 磁 动 力 学 过 程 - 飞 秒 磁 学CoFePt @Ruhr Uni., Germ)CoFePt@IPCAS,Beijing0-1-2520nm-3-4-51052 1054 1056 1058 1060Time (ps)CoFePt@IPCAS,BeijingFe/MgO(001), 何 为 @IPCAS0.00.51.01.5<strong>2.</strong>0<strong>2.</strong>53.03.5-1 0 1 2 3 4 5 6 7 8 9Time (ps)123456780 200 400 600 800 1000Time (ps)Frequency (GHz)14121086420perpendicular field Vs Frequency80 100 120 140 160 180Magnetic field (mT)