Magnus induced diode effect for skyrmions in channels with periodic potentials

Souza, J. C. Bellizotti; Vizarim, N. P.; Reichhardt, C.; Reichhardt, C.; Venegas, P. A.

doi:10.1088/1361-648x/ac9cc5

Cited by 8 publications

(7 citation statements)

References 56 publications

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“…Since fewer skyrmions are present in the sample after the annihilation is complete, and these skyrmions have shrunk in size due to the pressure from the applied current, the remaining skyrmions are able to pass more easily through the funnel opening and the net velocity along the easy flow direction is increased. In addition, the surviving skyrmions interact strongly with the wall and experience a Magnus velocity boost [29,56].…”

Section: Skyrmion Annihilationmentioning

confidence: 99%

Skyrmion transport and annihilation in funnel geometries

Rocha,

Bellizotti Souza,

Vizarim

et al. 2023

J. Phys.: Condens. Matter

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Using atomistic simulations, we have investigated the transport and annihilation of skyrmions interacting with a funnel array under a current applied perpendicular to the funnel axis. We find that transport without annihilation is possible at low currents, when the motion is dominated by skyrmion–skyrmion interactions and skyrmions push each other through the funnel opening. Skyrmion annihilation occurs for higher currents when skyrmions in the upper half of the sample exert pressure on skyrmions in the bottom half of the sample due to the external current. Upon interacting with the funnel wall, the skyrmions undergo a size reduction that makes it easier for them to pass through the funnel opening. We find five phases as a function of the applied current and the size of the funnel opening: (i) pinned, (ii) transport without annihilation, (iii) transport with annihilation, (iv) complete annihilation, and (v) a reentrant pinning phase that only occurs for very narrow openings. Our findings provide insight into how to control skyrmion transport using funnel arrays by delineating regimes in which transport of skyrmions is possible as well as the conditions under which annihilation occurs.

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Section: Skyrmion Annihilationmentioning

confidence: 99%

Skyrmion transport and annihilation in funnel geometries

Rocha,

Bellizotti Souza,

Vizarim

et al. 2023

J. Phys.: Condens. Matter

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“…89,90 . Additionally, diode-like effects have been investigated in channels with periodic potentials 91 and funnel-type geometries 92 . Numerous effects attributed to pinning defects on ferromagnetic skyrmions and other magnetic textures in one-and twodimensional systems is reviewed in the work of Ref.…”

Section: Skyrmion Dynamics In Tailored-design Racetracksmentioning

confidence: 99%

Plano de biossegurança do Departamento de Serviço Social da Universidade Federal do Amazonas – UFAM

Silva¹,

Santos²,

Pereira³

et al. 2020

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It deals with the Biosafety Plan of the Department of Social Work - DSS of the Institute of Philosophy, Humanities and Social Sciences - IFCHS of the Federal University of Amazonas - UFAM, prepared by the Planning Commission of the Department of Social Work to the Biosafety Plan's Institute of Philosophy, Human and Social Sciences, instituted by Ordinance nº 5, of June 23, 2020, of the DSS. The presented Biosafety Plan provides guidance on measures to prevent the transmission of COVID-19 which apply to all workplaces and all people in the workplace and which include measures to prevent hygiene and social distance. It aims to preserve lives, aiming to reconcile the return of the presential and remote activities of the DSS / IFCHS, based on surveillance and monitoring, corroborating with the prevention of the spread of the new Coronavirus or Covid-19. Biosafety is understood here as the set of actions aimed at preventing, minimizing or eliminating risks inherent in administrative, teaching, research, extension, innovation, technological development and service provision activities, aiming at the health of human beings, animals , the preservation of the environment and the quality of the results. The plan seeks to cover the various peculiarities of university life, presents guidelines and instructions for the operation and development of classroom activities and distance from professors, administrative staff and students, in the IFCHS space, and, consequently, in the UFAM space. This Plan considers the different approaches for the different sectors of the University, when considering the public service surrounding the department and the institute mentioned and the nature of the activities developed in each sector, in the same way that the “University Biosafety Plan” considers. Federal do Amazonas against the disease pandemic by SARS-COV-2 (COVID-19) ”, approved at the University Council Meeting on July 14, 2020 (Resolution 003/2020 - CONSUNI).

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Section: Introductionmentioning

confidence: 99%

“…It is reported that a ratchet effect is a net direct current transmission generated by a combination of disrupted spatial symmetry and oscillatory drive, which can be understood by a skyrmion diode effect [25,26]. There are some suggestions on how to construct the ratchet geometry of skyrmions, such as by using asymmetric potentials, interfaces, etc [25,27]. Up to now, the influence of voltage-controlled magnetic anisotropy (VCMA) on the motion of skyrmions [28][29][30][31] and its observations in experiments [32] have been investigated.…”

Section: Introductionmentioning

confidence: 99%

A magnetic skyrmion diode based on potential well inducting effect

Chen

et al. 2023

J. Phys.: Condens. Matter

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Magnetic skyrmions have great potential in the application of spintronic devices due to their stable topologically protected spin configuration. To meet the needs of spintronic device design, it is necessary to manipulate the movement of the magnetic skyrmions. Here we propose a skyrmion diode based on potential well induced skyrmion motion through theoretical calculations. The potential well is generated by the voltage-controlled magnetic anisotropy (VCMA) gradient. By utilizing the induction of the potential well as well as the skyrmion Hall effect (SkHE), the velocity and trajectory of the skyrmions can be controlled and the forward pass and reverse cutoff functions of diode-like devices have been realized. Furthermore, we report the dynamics of current-driven skyrmions in a racetrack with locally applied VCMA. Under the influence of the SkHE, the difference in dynamic behavior between forward and reverse motion of the skyrmions is obvious, and the potential well can produce different pinning, depinning and annihilating effects on forward and reverse moving skyrmions. O ur results can be beneficial for the design and development of magnetic skyrmion diodes.

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Magnus induced diode effect for skyrmions in channels with periodic potentials

Cited by 8 publications

References 56 publications

Skyrmion transport and annihilation in funnel geometries

Skyrmion transport and annihilation in funnel geometries

Plano de biossegurança do Departamento de Serviço Social da Universidade Federal do Amazonas – UFAM

A magnetic skyrmion diode based on potential well inducting effect

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