Synchronization of spin torque nano-oscillators through dipolar interactions

Journal Article · Mon Apr 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869203· OSTI ID:22273704

Chen, Hao-Hsuan; Wu, Jong-Ching; Horng, Lance ^[1]; Lee, Ching-Ming ^[2]; Chang, Ching-Ray; Chang, Jui-Hang ^[3]

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1. Department of Physics, National Changhua University of Education, Changhua 500, Taiwan (China)
2. Graduate School of Materials Science, National Yunlin University of Science and Technology, Douliou, 64002, Taiwan (China)
3. Department of Physics and Center for Quantum Sciences and Engineering, National Taiwan University, Taipei 10617, Taiwan (China)

In an array of spin-torque nano-oscillators (STNOs) that combine a perpendicular polarized fixed layer with strong in-plane anisotropy in the free layers, magnetic dipolar interactions can effectively phase-lock the array, thus further enhancing the power of the output microwave signals. We perform a qualitative analysis of the synchronization of an array based on the Landau-Lifshitz-Gilbert equation, with a spin-transfer torque that assumes strong in-plane anisotropy. Finally, we present the numerical results for four coupled STNOs to provide further evidence for the proposed theory.

• OSTI ID: 22273704
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANISOTROPY
DIFFERENTIAL EQUATIONS
LAYERS
MAGNETIC DIPOLES
MAGNETISM
MICROWAVE RADIATION
NANOSTRUCTURES
OSCILLATORS
POLARIZATION
SPIN
SYNCHRONIZATION
TORQUE