Current- and field-driven magnetic antivortices for nonvolatile data storage

Drews, André; Krüger, Benjamin; Meier, Guido; Bohlens, Stellan; Bocklage, Lars; Matsuyama, Toru; Bolte, Markus
February 2009
Applied Physics Letters;2/9/2009, Vol. 94 Issue 6, pN.PAG
Academic Journal
We demonstrate by micromagnetic simulations that magnetic antivortices are potential candidates for fast nonvolatile data-storage elements. These storage elements are excited simultaneously by alternating spin-polarized currents and their accompanying Oersted fields. Depending on the antivortex-core polarization p and the orientation of the in-plane magnetization c around the core, the superposition of current and field leads to either a suppression of gyration (logical “zero”) or an increased gyration amplitude (logical “one”). Above an excitation threshold the gyration culminates in the switching of the antivortex core. The switching can be seen as a cp-dependent writing of binary data, allowing to bring the antivortex into a distinct state. Furthermore a read-out scheme using an inductive loop situated on top of the element is investigated.


Related Articles

  • Polarization of molecular targets using infrared stimulated Raman adiabatic passage. Mukherjee, Nandini; Zare, Richard N. // Journal of Chemical Physics;9/7/2010, Vol. 133 Issue 9, p094301 

    We suggest that infrared stimulated Raman adiabatic passage, a coherent multiple excitation process, can be used to create a superposition of (2J+1) highly correlated M-state sublevels of a rigid rotor molecule with vibrational level v and rotational level J. This method employs the (v=0,J-2) to...

  • Magnetization of (100) Cu-Ni, (100) Cu-Co, and (100) Ni-Co superlattices deposited on silicon using a Cu seed layer. Chang, Chin-An // Applied Physics Letters;7/16/1990, Vol. 57 Issue 3, p297 

    The magnetization of (100)Cu-Ni, (100)Cu-Co, and (100)Ni-Co superlattices has been studied. The structures were grown on the (100)Cu/Si substrates, with the (100)Cu epitaxially grown on the (100)Si as the seed. The (100)oriented superlattices show different magnetization curves from the (111)...

  • Rotation operator approach to spin dynamics and the Euler geometric equations. Zhou, Jinyuan; Ye, Chaohui; Sanctuary, B. C. // Journal of Chemical Physics;10/15/1994, Vol. 101 Issue 8, p6424 

    The rotation operator approach proposed previously is applied to spin dynamics in a time-varying magnetic field. The evolution of the wave function is described, and that of the density operator is also treated in terms of a spherical tensor operator base. It is shown that this formulation...

  • Regularized magnetic islands. II. The role of polarization current. Mikhailovskii, A. B.; Pustovitov, V. D.; Smolyakov, A. I.; Tsypin, V. S. // Physics of Plasmas;Apr2000, Vol. 7 Issue 4 

    The role of polarization current in the problem of rotating magnetic islands in the absence of drift effects is discussed for the case of nonregularized and regularized velocity profiles governed by the perpendicular viscosity. The polarization current is calculated taking into account the...

  • Polarization switching in a tensile-strained InGaAs/InGaAsP multiple quantum well distributed feedback laser diode. Mizutani, Natsuhiko; Miyazawa, Sei-ichi; Nakanishi, Masahiro; Majima, Masao; Nitta, Jun; Sekiguchi, Yoshinobu; Nojiri, Hidetoshi; Handa, Yuichi // Applied Physics Letters;6/15/1998, Vol. 72 Issue 24 

    An inhomogeneously biased distributed feedback (DFB) laser diode (LD) with two electrodes switched its polarization mode by 3 mA change of the bias current, maintaining single longitudinal mode oscillation. In the active layer of the LD, 13 nm thick and 0.6% tensile-strained InGaAs multiple...

  • The role of polarization current in magnetic island evolution. Connor, J. W.; Waelbroeck, F. L.; Wilson, H. R. // Physics of Plasmas;Jun2001, Vol. 8 Issue 6, p2835 

    The polarization current plays an important role in the evolution of magnetic islands with a width comparable to the characteristic ion orbit width. Understanding the evolution of such small magnetic islands is important for two reasons: (1) to investigate the threshold mechanisms for growth of...

  • Near-field observation of plasmon excitation and propagation on ordered elliptical hole arrays. Chu, J.-Y.; Wang, T.-J.; Yeh, J.-T.; Lin, M.-W.; Chang, Y.-C.; Wang, J.-K. // Applied Physics A: Materials Science & Processing;Nov2007, Vol. 89 Issue 2, p387 

    We report a near-field study of the excitation and propagation of surface plasmon on ordered Ag elliptical hole arrays with a scattering-type scanning near-field optical microscope. Strong dipole-like local plasmon is identified at each individual hole from near-field optical intensity and phase...

  • Realizing a stable magnetic double-well potential on an atom chip. Estève, J.; Schumm, T.; Trebbia, J.-B.; Bouchoule, I.; Aspect, A.; Westbrook, C. I. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Aug2005, Vol. 35 Issue 1, p141 

    We discuss design considerations and the realization of a magnetic double-well potential on an atom chip using current-carrying wires. Stability requirements for the trapping potential lead to a typical size of order microns for such a device. We also present experiments using the device to...

  • Motional states of magnetic molecules and their coherent superposition. Mainos, C.; Baudon, J.; Karam, J.-C; Perales, F.; Robert, J.; Pirani, F.; Aquilanti, V. // Journal of Chemical Physics;12/1/2003, Vol. 119 Issue 21, p11159 

    We study the coherent superposition of motional states in magnetic molecules. The distinct time evolution of each motional state in the presence of an external magnetic field and the dynamics of the molecular rotation are found to be interrelated by a molecular orientation correlation function....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics