Current-driven resonances in magnetic multilayers.

We describe complex variations in resistance of a Co/Cu multilayer, generated by injection of an adjustable dc current density ( approximately 10(9) A/cm(2)) via a point contact. We attribute these variations to coupling of current-induced spin waves to lattice vibrations, leading especially to current-driven resonant excitations of phonons. We propose a simple model to explain the observed structured behavior of the variations as a function of the applied current and magnetic field.

[1]  Y. Bazaliy,et al.  Towards metallic magnetic memory: How to interpret experimental results on magnetic switching induced by spin-polarized currents , 2001 .

[2]  Tailoring anisotropic magnetoresistance and giant magnetoresistance hysteresis loops with spin-polarized current injection , 2001 .

[3]  L. Berger.  New origin for spin current and current-induced spin precession in magnetic multilayers , 2001 .

[4]  Xavier Waintal,et al.  Role of spin-dependent interface scattering in generating current-induced torques in magnetic multilayers , 2000 .

[5]  Fluctuation model of current-driven magnon excitation , 2001 .

[6]  Ralph,et al.  Current-driven magnetization reversal and spin-wave excitations in Co /Cu /Co pillars , 1999, Physical review letters.

[7]  Spin-wave emitting diodes and spin diffusion in magnetic multilayers , 1998 .

[8]  R. Buhrman,et al.  Current-induced realignment of magnetic domains in nanostructured Cu/Co multilayer pillars , 2000 .

[9]  J. Slonczewski.  Current-driven excitation of magnetic multilayers , 1996 .

[10]  I. Saveliev,et al.  Effects of injection current pulses on magnetic domain switching in stable electrodeposited 10 nm Ni contacts , 2000 .

[11]  G. A. Prinz,et al.  Switching of vertical giant magnetoresistance devices by current through the device , 1999 .

[12]  K. Xia,et al.  Spin torques in terromagnet/normal metal structures , 2001, cond-mat/0107589.

[13]  Magnetization reversal triggered by spin-polarized current in magnetic nanowires , 2000, cond-mat/0011228.

[14]  Jonathan Z. Sun.  Spin-current interaction with a monodomain magnetic body: A model study , 2000 .

[15]  Ralph,et al.  Current-induced switching of domains in magnetic multilayer devices , 1999, Science.

[16]  A. Fert,et al.  Spin-polarized current induced switching in Co/Cu/Co pillars , 2001 .

[17]  P. E. Zilberman,et al.  Current-driven switching of magnetic layers , 2001 .

[18]  J. Bass,et al.  Excitation of a magnetic multilayer by an electric current , 1998 .

[19]  Jean-Eric Wegrowe,et al.  Current-induced magnetization reversal in magnetic nanowires , 1999 .

[20]  Jonathan Z. Sun.  Current-driven magnetic switching in manganite trilayer junctions , 1999 .

[21]  John Casimir Slonczewski,et al.  Excitation of spin waves by an electric current , 1999 .

[22]  J.-E. Wegrowe.  Thermokinetic approach of the generalized Landau-Lifshitz-Gilbert equation with spin-polarized current , 2000 .

[23]  Shou-Cheng Zhang,et al.  MODIFICATION OF THE LANDAU-LIFSHITZ EQUATION IN THE PRESENCE OF A SPIN-POLARIZED CURRENT IN COLOSSAL- AND GIANT-MAGNETORESISTIVE MATERIALS , 1998 .

[24]  Berger.  Emission of spin waves by a magnetic multilayer traversed by a current. , 1996, Physical review. B, Condensed matter.

[25]  J. Slonczewski.  Currents and torques in metallic magnetic multilayers , 2002 .

[26]  J. Bass,et al.  Generation and detection of phase-coherent current-driven magnons in magnetic multilayers , 2000, Nature.

[27]  C Heide.  Spin currents in magnetic films. , 2001, Physical review letters.

[28]  Noncollinear spin transfer in Co/Cu/Co multilayers (invited) , 2001, cond-mat/0110275.

[29]  Lucena,et al.  Magnon excitation by spin injection in thin Fe/Cr/Fe films , 2000, Physical review letters.

[30]  P. Levy,et al.  Mechanisms of spin-polarized current-driven magnetization switching. , 2002, Physical review letters.

[31]  Robert A. Buhrman,et al.  Point-contact studies of current-controlled domain switching in magnetic multilayers , 2000 .

[32]  Gonçalo Albuquerque,et al.  Spin transfer into an inhomogeneous magnetization distribution , 2001 .

[33]  Robert A. Buhrman,et al.  Spin-polarized current switching of a Co thin film nanomagnet , 2000 .

[34]  P. Brouwer,et al.  Current-induced switching of magnetic domains to a perpendicular configuration , 2000, cond-mat/0010255.

[35]  M. D. Stiles,et al.  Anatomy of spin-transfer torque , 2002 .