Phase locking of vortex cores in two coupled magnetic nanopillars

Journal Article · Sat Nov 15 00:00:00 EST 2014 · AIP Advances

DOI:https://doi.org/10.1063/1.4902178· OSTI ID:22420169

Zhu, Qiyuan; Liu, Xianyin; Zheng, Qi; Zhang, Senfu; Wang, Jianbo; Liu, Qingfang ^[1]

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1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, Peoples Republic of China (China)

Phase locking dynamics of the coupled vortex cores in two identical magnetic spin valves induced by spin-polarized current are studied by means of micromagnetic simulations. Our results show that the available current range of phase locking can be expanded significantly by the use of constrained polarizer, and the vortices undergo large orbit motions outside the polarization areas. The effects of polarization areas and dipolar interaction on the phase locking dynamics are studied systematically. Phase locking parameters extracted from simulations are discussed by theoreticians. The dynamics of vortices influenced by spin valve geometry and vortex chirality are discussed at last. This work provides deeper insights into the dynamics of phase locking and the results are important for the design of spin-torque nano-oscillators.

• OSTI ID: 22420169
• Journal Information: AIP Advances, Vol. 4, Issue 11; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHIRALITY
INTERACTIONS
POLARIZATION
SIMULATION
SPIN
SPIN ORIENTATION