Power spectrum of current-induced magnetization dynamics in uniaxial nanomagnets

被引：0

作者：

Serpico, Claudio ^{[1
]}

Bertotti, Giorgio ^{[2
]}

Bonin, Roberto ^{[2
]}

D'Aquino, Massimiliano ^{[3
]}

Mayergoyz, Isaak D. ^{[4
,5
]}

机构：

[1] Dipartimento di Ingegneria Elettrica, Universit di Napoli Federico II, 80125 Napoli, Italy

[2] Istituto Nazionale di Ricerca Metrologica (INRiM), 10135 Torino, Italy

[3] Dipartimento per le Tecnologie, Universit di Napoli Parthenope, 80133 Napoli, Italy

[4] UMIACS, University of Maryland, College Park, MD 20742, United States

[5] Electrical and Computer Engineering Department, University of Maryland, College Park, MD 20742

来源：

Journal of Applied Physics | 2007年 / 101卷 / 09期

关键词：

Nanomagnets with uniaxial symmetry driven by spin polarized currents are considered; in which anisotropy; applied field; and spin polarization are all aligned along the symmetry axis. Thermal fluctuations are taken into account by adding a Gaussian white noise stochastic term to the equation for the deterministic dynamics. The corresponding Fokker-Planck equation is derived and it is solved by using separation of variable and eigenfunction expansion techniques. From the solution of the Fokker-Planck equation; the autocorrelation function and the power spectral density of magnetization are computed. The position and the linewidth of the peaks in the power spectral density are discussed in detail. © 2007 American Institute of Physics;

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摘要：

Conference article (CA)

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