Dynamic control of metastable remanent states in mesoscale magnetic elements

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4906959· OSTI ID:22403040

Ding, J.; Jain, S.; Pearson, J. E.; Lendinez, S. ^[1]; Khovaylo, V. ^[2]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. National University of Science and Technology “MISiS,” Moscow 119049 (Russian Federation)

The formation of the vortex-antivortex-vortex (v-av-v) metastable remanent states in elongated magnetic elements have been systematically investigated using micromagnetic modeling. It is demonstrated that the v-av-v magnetization pattern can be effectively stabilized by exciting the single vortex state with an external RF field. Furthermore, we show that a set of different polarity combinations of the vortex cores can be achieved by adjusting the frequency and amplitude of the excitation field. The corresponding dynamic response in time- and frequency-domain has also been presented. Owing to the diversity of the collective modes with different vortex-antivortex combinations, this system may open promising perspectives in the area of spin transfer torque oscillators.

• OSTI ID: 22403040
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
COMPUTERIZED SIMULATION
CONTROL
EXCITATION
FREQUENCY DEPENDENCE
MAGNETIC MATERIALS
MAGNETISM
MAGNETIZATION
METASTABLE STATES
OSCILLATORS
RADIOWAVE RADIATION
SPIN
TORQUE
VORTICES