Electrical detection of internal dynamical properties of domain walls

Sangiao, Soraya; Viret, M.

doi:10.1103/physrevb.89.104412

Cited by 6 publications

(5 citation statements)

References 21 publications

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“…32 (b) shows the measurement results with the depinning field (the field required to move the domain wall past the pinning site) shown in blue and the rectification voltage shown in red. Thus SR measurements can be used to determine the domain wall resonance of both transverse and vortex domain walls and have even been used to observe multiple resonances within a magnetic domain [27,381].…”

Section: Electrical Detection Of Domain Wall Dynamicsmentioning

confidence: 99%

Electrical detection of magnetization dynamics via spin rectification effects

2016

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The purpose of this article is to review the current status of a frontier in dynamic spintronics and contemporary magnetism, in which much progress has been made in the past decade, based on the creation of a variety of micro-and nano-structured devices that enable electrical detection of magnetization dynamics. The primary focus is on the physics of spin rectification effects, which are well suited for studying magnetization dynamics and spin transport in a variety of magnetic materials and spintronic devices. Intended to be intelligible to a broad audience, the paper begins with a pedagogical introduction, comparing the methods of electrical detection of charge and spin dynamics in semiconductors and magnetic materials respectively. After that it provides a comprehensive account of the theoretical study of both the angular dependence and line shape of electrically detected ferromagnetic resonance (FMR), which is summarized in a handbook formate easy to be used for analyzing experimental data. We then review and examine the similarity and differences of various spin rectification effects found in ferromagnetic films, magnetic bilayers and magnetic tunnel junctions, including a discussion of how to properly distinguish spin rectification from the spin pumping/inverse spin Hall effect generated voltage. After this we review the broad applications of rectification effects for studying spin waves, nonlinear dynamics, domain wall dynamics, spin current, and microwave imaging. We also discuss spin rectification in ferromagnetic semiconductors. The paper concludes with both historical and future perspectives, by summarizing and comparing three generations of FMR spectroscopy which have been developed for studying magnetization dynamics.

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Section: Electrical Detection Of Domain Wall Dynamicsmentioning

confidence: 99%

Electrical detection of magnetization dynamics via spin rectification effects

2016

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“…However, in the universal law describing DW velocity, γ is hidden in phenomenological constants 13,14 . In addition, some phenomena related to DW surface energy have not been well understood, such as DW pinning in an artificial constriction [15][16][17] . In particular, the surface tension of DW plays a critical role in the topological transition of domain structures, for example, the transition from domain stripes to skyrmionic bubbles 18 .…”

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confidence: 99%

Direct Observation of Domain-Wall Surface Tension by Deflating or Inflating a Magnetic Bubble

et al. 2018

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The surface energy of a magnetic Domain Wall (DW) strongly affects its static and dynamic behaviours. However, this effect was seldom directly observed and many related phenomena have not been well understood. Moreover, a reliable method to quantify the DW surface energy is still missing. Here, we report a series of experiments in which the DW surface energy becomes a dominant parameter. We observed that a semicircular magnetic domain bubble could spontaneously collapse under the Laplace pressure induced by DW surface energy. We further demonstrated that the surface energy could lead to a geometrically induced pinning when the DW propagates in a Hall cross or from a nanowire into a nucleation pad. Based on these observations, we developed two methods to quantify the DW surface energy, which could be very helpful to estimate intrinsic parameters such as Dzyaloshinskii-Moriya Interactions (DMI) or exchange stiffness in magnetic ultra-thin films.

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“…Applications typically exploit DW displacement and/or resonant DW excitations 6 , the latter corresponding to precessional magnetization dynamics localized at the DW [6][7][8][9][10][11][12][13] . These excitations can can be exploited in oscillators 14 and magnonic devices 15,16 as well as for assisting domain wall motion [17][18][19][20][21] or depinning 9,[22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

“…Domain walls (DWs) separate oppositely oriented magnetic domains in ferromagnetic strips and have applications ranging from data storage 1 to neuromorphic computing 2,3 and biotechnology 4,5 . Applications typically exploit DW displacement and/or resonant DW excitations 6 , the latter corresponding to precessional magnetization dynamics localized at the DW [6][7][8][9][10][11][12][13] . These excitations can can be exploited in oscillators 14 and magnonic devices 15,16 as well as for assisting domain wall motion [17][18][19][20][21] or depinning 9,[22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Resonant translational, breathing, and twisting modes of transverse magnetic domain walls pinned at notches

et al. 2016

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We study translational, breathing and twisting resonant modes of transverse magnetic domain walls pinned at notches in ferromagnetic nanostrips. We demonstrate that a mode's sensitivity to notches depends strongly on the characteristics of that particular resonance. For example, the frequencies of modes involving lateral motion of the wall are the ones which are most sensitive to changes in the notch intrusion depth (especially at the narrower, more strongly confined end of the domain wall). In contrast, the breathing mode, whose dynamics are concentrated away from the notches is relatively insensitive to changes in the notches' sizes. We also demonstrate a sharp drop in the translational mode's frequency towards zero when approaching depinning which is found, using a harmonic oscillator model, to be consistent with a reduction in the local slope of the notch-induced confining potential at its edge.

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Electrical detection of internal dynamical properties of domain walls

Cited by 6 publications

References 21 publications

Electrical detection of magnetization dynamics via spin rectification effects

Electrical detection of magnetization dynamics via spin rectification effects

Direct Observation of Domain-Wall Surface Tension by Deflating or Inflating a Magnetic Bubble

Resonant translational, breathing, and twisting modes of transverse magnetic domain walls pinned at notches

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