Micromagnetic study of high-power spin–torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar under external magnetic fields

Huang, Houbing; Ma, Xingqiao; Zhao, Chongjun; Liu, Z.H.; Chen, Lei

doi:10.1016/j.jmmm.2014.03.050

Cited by 7 publications

(2 citation statements)

References 30 publications

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“…We investigated the influence of normal substrate strains 11 and 22 on the magnetization state by assuming a zero shear strain. The dynamics of magnetization was investigated by numerically solving the time-dependent LLGS equation using the Gauss-Seidel projection method and the semiimplicit Fourier spectral method [48][49][50][51][52][53]. The samples were discretized in computational cells of 2 × 2 × 2 nm 3 .…”

Section: Model Descriptionmentioning

confidence: 99%

Micromagnetic Simulation of Strain-Assisted Current-Induced Magnetization Switching

Huang

Zhao

2016

Advances in Condensed Matter Physics

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We investigated the effect of substrate misfit strain on the current-induced magnetization switching in magnetic tunnel junctions by combining micromagnetic simulation with phase-field microelasticity theory. Our results indicate that the positive substrate misfit strain can decrease the critical current density of magnetization switching by pushing the magnetization from out-of-plane to in-plane directions, while the negative strain pushes the magnetization back to the out-of-plane directions. The magnetic domain evolution is obtained to demonstrate the strain-assisted current-induced magnetization switching.

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Section: Model Descriptionmentioning

confidence: 99%

Micromagnetic Simulation of Strain-Assisted Current-Induced Magnetization Switching

Huang

Zhao

2016

Advances in Condensed Matter Physics

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“…The output power and frequency of the oscillation signal can be detected by the magnetoresistance effect [1]. Theoretical and experimental results show that out-of-plane precession usually prefers a larger power output than in-plane precession [13].…”

Section: Introductionmentioning

confidence: 99%

Micromagnetic prediction strain and current co-mediated spindynamics in skyrmion-based spin-torque nano-oscillator

Cui¹,

Zhu²,

Qiu³

et al. 2022

J. Phys. D: Appl. Phys.

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In this article, we theoretically investigate the influence of strain on the oscillation frequency characteristics of a skyrmion-based spin-torque nano-oscillator (STNO) using micromagnetic simulations. The system consists of an ultrathin nanopillar magnetic film with interfacial Dzyaloshinskii–Moriya interactions and a ring-shaped region to offer a tunable spatial strain source. The applied strain gives rise to an extra effective field in the magnetic film through magnetoelastic coupling and forms a strong confined potential for skyrmion dynamics. Our simulation results show that the operation frequency of the STNO can be effectively modulated by the strain. Furthermore, we introduce a simplified analytical expression of the skyrmion gyration dynamics to explain the micromagnetic simulation results. Our results will be useful in the development of wide-range frequency-tunable microwave emitters and frequency-shift keying for wireless communication.

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Simulation of stress-modulated magnetization precession frequency in Heusler-based spin torque oscillator

Huang

Zhao

2017

Journal of Magnetism and Magnetic Materials

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We investigated stress-modulated magnetization precession frequency in Heuslerbased spin transfer torque oscillator by combining micromagnetic simulations with phase field microelasticity theory, by encapsulating the magnetic tunnel junction into multilayers structures. We proposed a novel method of using an external stress to control the magnetization precession in spin torque oscillator instead of an external magnetic field. The stress-modulated magnetization precession frequency can be linearly modulated by externally applied uniaxial in-plane stress, with a tunable range 4.4~7.0 GHz under the stress of 10MPa. By comparison, the out-ofplane stress imposes negligible influence on the precession frequency due to the large out-of-plane demagnetization field. The results offer new inspiration to the design of spin torque oscillator devices that simultaneously process high frequency, narrow output band, and tunable over a wide range of frequencies via external stress.

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Micromagnetic study of high-power spin–torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar under external magnetic fields

Cited by 7 publications

References 30 publications

Micromagnetic Simulation of Strain-Assisted Current-Induced Magnetization Switching

Micromagnetic Simulation of Strain-Assisted Current-Induced Magnetization Switching

Micromagnetic prediction strain and current co-mediated spindynamics in skyrmion-based spin-torque nano-oscillator

Simulation of stress-modulated magnetization precession frequency in Heusler-based spin torque oscillator

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