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The LLS equation is analyzed by Melnikov disturbing method when non-constant spin torque is considered. Computing codes are programmed by combining VC and MATLAB. The results reveal that the magnetization trace vibrates round the non-disturbing trace at first，and then surges when close to the reversal point，and the time of reversal is shorter compared with the trace with constant spin torque.
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Keywords:
- spin torque /
- magnetization /
- LLS equation /
- disturbing method
[1] ［1］Wolf S A，Awschalom D D，Buhrman R A 2001 Science 294 1488
[2] ［2］Kiselev S I，Sankey J C，Krivorotov I N，Emley N C 2003 Nature(London) 425 380
[3] ［3］Slonczewski J, Magn J 1996 Magn. Mater 159 L1
[4] ［4］Berger L 1996 Phys. Rev. B 54 9353
[5] ［5］Maxximiliano dAquino 2004 Doctorate Thesis. Nonlinear magnetization dynamics in thin-films and nanoparticles. December
[6] ［6］Yang Z Y 2007 Spin Anglular Momentum Transfer in Magnetic Nonostructure (Columbia：University of Missiouri-Columbia)
[7] ［7］Bertotti G，Serpico C，Mayergoyz I D 2004 Pyhs. Rev. B 343 325
[8] ［8］Bertotti G，Mayergoyz I D，Serpico C 2004 Physica B 343 325
[9] ［9］Sun J Z 2000 Phys. Rev. B 62 570
[10] ］Pufall M R，Rippard W H，Kaka S，Russek S E，Silva T J，Katine J，Carey M 2004 Phys. Rev. B 69 214409
[11] ］Wang C K，Wang H S, Zhang Q G 1999 Chin. Phys. 8 185
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[1] ［1］Wolf S A，Awschalom D D，Buhrman R A 2001 Science 294 1488
[2] ［2］Kiselev S I，Sankey J C，Krivorotov I N，Emley N C 2003 Nature(London) 425 380
[3] ［3］Slonczewski J, Magn J 1996 Magn. Mater 159 L1
[4] ［4］Berger L 1996 Phys. Rev. B 54 9353
[5] ［5］Maxximiliano dAquino 2004 Doctorate Thesis. Nonlinear magnetization dynamics in thin-films and nanoparticles. December
[6] ［6］Yang Z Y 2007 Spin Anglular Momentum Transfer in Magnetic Nonostructure (Columbia：University of Missiouri-Columbia)
[7] ［7］Bertotti G，Serpico C，Mayergoyz I D 2004 Pyhs. Rev. B 343 325
[8] ［8］Bertotti G，Mayergoyz I D，Serpico C 2004 Physica B 343 325
[9] ［9］Sun J Z 2000 Phys. Rev. B 62 570
[10] ］Pufall M R，Rippard W H，Kaka S，Russek S E，Silva T J，Katine J，Carey M 2004 Phys. Rev. B 69 214409
[11] ］Wang C K，Wang H S, Zhang Q G 1999 Chin. Phys. 8 185
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