Tuning domain wall dynamics by shaping nanowires cross-sections

Altbir, D.; Fonseca, Jakson M.; Chubykalo‐Fesenko, O.; Corona, Rosa M.; Moreno, R.; Carvalho-Santos, Vagson L.; Ivanov, Yurii P.

doi:10.1038/s41598-020-78761-w

Cited by 13 publications

(5 citation statements)

References 53 publications

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“…Particularly, advances in 3D-printing techniques [27,28] have enhanced the fabrication of multifaceted [29] and curved [30][31][32] magnetic NWs. Such experimental techniques would allow corroborating theoretical results that predict that DWs displacement in multifaceted and bent NWs under the action of a constant external stimulus exhibit an oscillatory behavior [33][34][35][36]. Indeed, transverse DWs propagating in straight NWs with rectangular cross-sections simultaneously rotate and oscillate around and along the NW [37] when a magnetic field is applied parallel to its axis.…”

supporting

confidence: 53%

Tuning domain wall oscillation frequency in bent nanowires through a mechanical analogy

Bittencourt,

Carvalho-Santos,

Altbir

et al. 2023

Nanotechnology

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In this work, we present a theoretical model for domain wall (DW) oscillations in a curved magnetic nanowire with a constant curvature under the action of a uniaxial magnetic field. Our results show that the DW dynamics can be described as that of the mechanical pendulum, and both the NW curvature and the external magnetic field influence its oscillatory frequency. A comparison between our theoretical approach and experimental data in the literature shows an excellent agreement. The results presented here can be used to design devices demanding the proper control of the DW oscillatory motion in NWs.

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supporting

confidence: 53%

Tuning domain wall oscillation frequency in bent nanowires through a mechanical analogy

Bittencourt,

Carvalho-Santos,

Altbir

et al. 2023

Nanotechnology

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“…It is worth noticing that N µ = N z for NW with circular cross section 30 and consequently, Γ d = 0. This result also applies to a NW with a polygonal cross-section with small area 16 .…”

Section: A General Formulationmentioning

confidence: 62%

“…By shaping the NW cross-section, the Walker limit can be either suppressed (circular cross-section 15 ) or engineered, i.e. tunning the amplitude and frequency of the oscillations (polygonal cross sections 16 ).…”

Section: Introductionmentioning

confidence: 99%

Domain wall damped harmonic oscillations induced by curvature gradients in elliptical magnetic nanowires

Bittencourt¹,

Castillo-Sepúlveda²,

Chubykalo-Fesenko³

et al. 2022

Preprint

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Understanding the domain wall (DW) dynamics in magnetic nanowires (NW) is crucial for spintronic-based applications demanding the use of DWs as information carriers. This work focuses on the dynamics of a DW displacing along a bent NW with an elliptical shape under the action of spin-polarized electric currents and external magnetic fields. Our results evidence that a curvature gradient induces an exchange-driven effective tangential field responsible for pinning a DW near the maximum curvature point in a NW. The DW equilibrium position depends on the competition between the torques produced by the external stimuli and the curvature-induced effective fields. When the external stimuli are below a certain threshold, the DW follows a damped harmonic oscillation around the equilibrium position. Above this threshold, DW displaces along the NW under an oscillatory translational motion.

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“…Predicting and uncovering novel functional devices often require modeling their behaviour at multiple length scales, as evidenced by the works of Chubykalo-Fesenko (Consejo Superior de Investigaciones Científicas-CSIC) and Altbir (Universidad de Santiago de Chile-USACH). There is a pressing need for solutions that go beyond micromagnetic simulations, and bridge ab initio to atomistic and to submicrometric regimes, while correctly describing magnetic coupling phenomena at the surfaces and interfaces [81]. These become more relevant by potentially incorporating other degrees of freedom such as atomic lattice vibrations (phonons), electrical behaviour, and temperature effects.…”

Section: Current and Future Challengesmentioning

confidence: 99%

The 2022 applied physics by pioneering women: a roadmap

Mayor

Alberi

Ayers³

et al. 2023

J. Phys. D: Appl. Phys.

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Women have made significant contributions to applied physics research and development, and their participation is vital to continued progress. Recognizing these contributions is important for encouraging increased involvement and creating an equitable environment in which women can thrive. This Roadmap on Women in Applied Physics, written by women scientists and engineers, is intended to celebrate women’s accomplishments, highlight established and early career researchers enlarging the boundaries in their respective fields, and promote increased visibility for the impact women have on applied physics research. Perspectives cover the topics of plasma materials processing and propulsion, super-resolution microscopy, bioelectronics, spintronics, superconducting quantum interference device technology, quantum materials, 2D materials, catalysis and surface science, fuel cells, batteries, photovoltaics, neuromorphic computing and devices, nanophotonics and nanophononics, and nanomagnetism. Our intent is to inspire more women to enter these fields and encourage an atmosphere of inclusion within the scientific community.

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Tuning domain wall dynamics by shaping nanowires cross-sections

Cited by 13 publications

References 53 publications

Tuning domain wall oscillation frequency in bent nanowires through a mechanical analogy

Tuning domain wall oscillation frequency in bent nanowires through a mechanical analogy

Domain wall damped harmonic oscillations induced by curvature gradients in elliptical magnetic nanowires

The 2022 applied physics by pioneering women: a roadmap

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