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Nonlinear magnetization dynamics of the classical ferromagnet with two single-ion anisotropies in an external magnetic field
Liu, WM; Zhang, WS; Pu, FC; Zhou, X; Liu, WM , Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA.
1999
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号60期号:18页码:12893-12911
摘要By using a stereographic projection of the unit sphere of magnetization vector onto a complex plane for the equations of motion, the effect of an external magnetic field for integrability of the system is discussed. The properties of the Jest solutions and the scattering data are then investigated through introducing transformations other than the Riemann surface in order to avoid double-valued functions of the usual spectral parameter. The exact multisoliton solutions are investigated by means of the Binet-Cauchy formula. The results showed that under the action of an external magnetic field nonlinear magnetization depends essentially on two parameters: its center moves with a constant velocity, while its shape changes with another constant velocity; its amplitude and width vary periodically with time, while its shape is also dependent on time and is unsymmetric with respect to its center. The orientation of the nonlinear magnetization in the plane orthogonal to the anisotropy axis changes with an external magnetic field. The total magnetic momentum and the integral of the motion coincident with its z component depend on time. The mean number of spins derivated from the ground state in a localized magnetic excitations is dependent on time. The asymptotic behavior of multisoliton solutions, the total displacement of center, and the phase shift of the jth peak an also analyzed. [S0163-1829(99)07121-0].
部门归属Univ Texas, Dept Phys, Austin, TX 78712 USA; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
关键词Heisenberg Spin Chain Landau-lifschitz Equation Inverse Scattering Transform Linear Schrodinger-equation Riemann Boundary-problem Easy-plane Lifshitz Equation Soliton-solutions Equivalence Excitations
学科领域Physics
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收录类别SCI
WOS记录号WOS:000083765400054
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被引频次:53[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13072
专题理论物理所1978-2010年知识产出
通讯作者Liu, WM , Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA.
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Liu, WM,Zhang, WS,Pu, FC,et al. Nonlinear magnetization dynamics of the classical ferromagnet with two single-ion anisotropies in an external magnetic field[J]. PHYSICAL REVIEW B,1999,60(18):12893-12911.
APA Liu, WM,Zhang, WS,Pu, FC,Zhou, X,&Liu, WM , Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA..(1999).Nonlinear magnetization dynamics of the classical ferromagnet with two single-ion anisotropies in an external magnetic field.PHYSICAL REVIEW B,60(18),12893-12911.
MLA Liu, WM,et al."Nonlinear magnetization dynamics of the classical ferromagnet with two single-ion anisotropies in an external magnetic field".PHYSICAL REVIEW B 60.18(1999):12893-12911.
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