Spectroscopy and Imaging of Edge Modes in Permalloy Nanodisks

Guo, Feng; Belova, Lyubov; McMichael, Robert D.

doi:10.1103/physrevlett.110.017601

Cited by 77 publications

(67 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5 Second, because it permits nano-patterning of the YIG and thus the engineering of the SW spectra through spatial confinement. [6][7][8] There is, however, no report yet 9 on the measurement of the dynamical properties on submicron size nanostructure patterned out of YIG ultrathin films.…”

Section: Measurement Of the Intrinsic Damping Constant In Individual mentioning

confidence: 99%

Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt

Hahn

Naletov

Loubens

et al. 2014

Applied Physics Letters

View full text Add to dashboard Cite

International audienceWe report on an experimental study on the spin-waves relaxation rate in two series of nanodisks of diameter φ =300, 500 and 700 nm, patterned out of two systems: a 20 nm thick yttrium iron garnet (YIG) film grown by pulsed laser deposition either bare or covered by 13 nm of Pt. Using a magnetic resonance force microscope, we measure precisely the ferromagnetic resonance linewidth of each individual YIG and YIG|Pt nanodisks. We find that the linewidth in the nanostructure is sensibly smaller than the one measured in the extended film. Analysis of the frequency dependence of the spectral linewidth indicates that the improvement is principally due to the suppression of the inhomogeneous part of the broadening due to geometrical confinement, suggesting that only the homogeneous broadening contributes to the linewidth of the nanostructure. For the bare YIG nano-disks, the broadening is associated to a damping constant α = 4 · 10 −4. A 3 fold increase of the linewidth is observed for the series with Pt cap layer, attributed to the spin pumping effect. The measured enhancement allows to extract the spin mixing conductance found to be G ↑↓ = 1.55 · 10 14 Ω −1 m −2 for our YIG(20nm)|Pt interface, thus opening large opportunities for the design of YIG based nanostructures with optimized magnetic losses

show abstract

Section: Measurement Of the Intrinsic Damping Constant In Individual mentioning

confidence: 99%

Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt

Hahn

Naletov

Loubens

et al. 2014

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…1). Диаметр зонда со-ответствовал типичным размерам зондов, используемых в МРСМ [10,11], и составлял 200 nm. Исследовались колебания намагниченности образцов в переменном маг-нитном поле h величиной 0.1 mT, направленном в плос-кости образца вдоль оси y. В расчетах регистрировались временные зависимости установившихся колебаний всех компонент намагниченности [12].…”

Section: методика расчетовunclassified

Локализованные Моды Спин-Волнового Резонанса Ферромагнитных Микрополосок В Поле Магнитного Зонда

Gorev¹,

Миронов²

2017

Физика Твердого Тела

View full text Add to dashboard Cite

Приводятся результаты микромагнитного моделирования вынужденных колебаний намагниченности планарных микрополосок из NiFe с анизотропией легкая плоскость и из Co/Pt с перпендикулярной анизотропией типа легкая ось в поле магнитного сферического зонда. Показано, что под воздействием поля зонда в полосках NiFe реализуется связанное состояние "еж"-"антивихрь", обусловленное латеральными компонентами поля зонда, а в слое Co/Pt реализуется скирмионное состояние намагниченности. Эти эффекты приводят к искажению пространственных распределений колебаний намагниченности микрополосок и к появлению дополнительных резонансов в спектрах колебаний, связанных с модами, локализованными в поле зонда. Работа выполнена при поддержке Российского научного фонда (проект N 16-12-10254). DOI: 10.21883/FTT.2017.11.45053.10k

show abstract

“…As before, the pulsed field is uniform and applied in the plane of the disks perpendicular to the bias magnetic field. The spectrum and mode profiles of isolated magnetic elements in the quasiuniform ground state of various, e.g., rectangular, 37 elliptical, 48,49 stadiumlike, 50 and round, 36,[51][52][53] shapes were extensively studied by experimental, numerical, and analytical means. For rectangular elements, it is possible to use the mode classification scheme derived in Ref.…”

Section: Spectra and Spatial Profiles Of Precessional Modes In Fimentioning

confidence: 99%

Role of boundaries in micromagnetic calculations of magnonic spectra of arrays of magnetic nanoelements

et al. 2013

View full text Add to dashboard Cite

We have used micromagnetic simulations performed with open and periodic boundary conditions to study the influence of the presence of array boundaries on the spectra and spatial profiles of collective spin-wave excitations in arrays of magnetic nanoelements. The spectra and spatial profiles of collective spin waves excited in isolated arrays of nanoelements and those forming a part of quasi-infinite arrays are qualitatively different even if the same excitation field is used in the simulations. In particular, the use of periodic boundary conditions suppresses the excitation of nonuniform collective modes by uniform excitation fields. However, the use of nonuniform excitation fields in combination with periodic boundary conditions is shown to enable investigation of the structure of magnonic dispersion curves for quasi-infinite arrays (magnonic crystals) in different directions in the reciprocal space and for different magnonic bands. The results obtained in the latter case show a perfect agreement with those obtained with the dynamical matrix method for infinite arrays of nanoelements of the same geometry and magnetic properties.

show abstract

Spectroscopy and Imaging of Edge Modes in Permalloy Nanodisks

Cited by 77 publications

References 37 publications

Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt

Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt

Локализованные Моды Спин-Волнового Резонанса Ферромагнитных Микрополосок В Поле Магнитного Зонда

Role of boundaries in micromagnetic calculations of magnonic spectra of arrays of magnetic nanoelements

Contact Info

Product

Resources

About