Field tunable localization of spin waves in antidot arrays

Hu, Chunlian; Magaraggia, Rhet; Yuan, H. Y.; Chang, Chia-Ou; Kostylev, Mikhail; Tripathy, D.; Adeyeye, A. O.; Stamps, R. L.

doi:10.1063/1.3606556

Cited by 33 publications

(24 citation statements)

References 17 publications

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“…In order to overcome these issues, antidot arrays, consisting of an array of holes in a magnetic thin film, offer a promising geometry which has been explored by several groups. In these structures the periodic array of holes are used as scattering centres for spinwaves [114][115][116][117][118][119]. The spinwaves can travel easily through the medium surrounding the holes, but are nevertheless affected by the holes.…”

Section: Additional Magnonic Structuresmentioning

confidence: 99%

Artificial ferroic systems: novel functionality from structure, interactions and dynamics

Heyderman¹,

Stamps²

2013

J. Phys.: Condens. Matter

211

193

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Lithographic processing and film growth technologies are continuing to advance, so that it is now possible to create patterned ferroic materials consisting of arrays of sub-1 μm elements with high definition. Some of the most fascinating behaviour of these arrays can be realised by exploiting interactions between the individual elements to create new functionality. The properties of these artificial ferroic systems differ strikingly from those of their constituent components, with novel emergent behaviour arising from the collective dynamics of the interacting elements, which are arranged in specific designs and can be activated by applying magnetic or electric fields. We first focus on artificial spin systems consisting of arrays of dipolar-coupled nanomagnets and, in particular, review the field of artificial spin ice, which demonstrates a wide range of fascinating phenomena arising from the frustration inherent in particular arrangements of nanomagnets, including emergent magnetic monopoles, domains of ordered macrospins, and novel avalanche behaviour. We outline how demagnetisation protocols have been employed as an effective thermal anneal in an attempt to reach the ground state, comment on phenomena that arise in thermally activated systems and discuss strategies for selectively generating specific configurations using applied magnetic fields. We then move on from slow field and temperature driven dynamics to high frequency phenomena, discussing spinwave excitations in the context of magnonic crystals constructed from arrays of patterned magnetic elements. At high frequencies, these arrays are studied in terms of potential applications including magnetic logic, linear and non-linear microwave optics, and fast, efficient switching, and we consider the possibility to create tunable magnonic crystals with artificial spin ice. Finally, we discuss how functional ferroic composites can be incorporated to realise magnetoelectric effects. Specifically, we discuss artificial multiferroics (or multiferroic composites), which hold promise for new applications that involve electric field control of magnetism, or electric and magnetic field responsive devices for high frequency integrated circuit design in microwave and terahertz signal processing. We close with comments on how enhanced functionality can be realised through engineering of nanostructures with interacting ferroic components, creating opportunities for novel spin electronic devices that, for example, make use of the transport of magnetic charges, thermally activated elements, and reprogrammable nanomagnet systems.

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Section: Additional Magnonic Structuresmentioning

confidence: 99%

Artificial ferroic systems: novel functionality from structure, interactions and dynamics

Heyderman¹,

Stamps²

2013

J. Phys.: Condens. Matter

211

193

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“…Magnetic antidots have emerged as an important system of MCs; and a thorough investigation of high frequency magnetization dynamics in them has been reported in the literature. [30][31][32][33][34][35] Magnonic antidot waveguide (MAW) is an attractive option for manipulation of transmitted spin waves towards the above application, but it has only recently been started to be explored. [36][37][38] So far, a study of the dependence of spinwave dispersion on the shapes of the antidots has not been reported.…”

Section: Magnonicsmentioning

confidence: 99%

Effect of hole shape on spin-wave band structure in one-dimensional magnonic antidot waveguide

Kumar¹,

Sabareesan²,

Wang³

et al. 2013

Journal of Applied Physics

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We present the possibility of tuning the spin-wave band structure, particularly the bandgaps in a nanoscale magnonic antidot waveguide by varying the shape of the antidots. The effects of changing the shape of the antidots on the spin-wave dispersion relation in a waveguide have been carefully monitored. We interpret the observed variations by analysing the equilibrium magnetic configuration and the magnonic power and phase distribution profiles during spin-wave dynamics. The inhomogeneity in the exchange fields at the antidot boundaries within the waveguide is found to play a crucial role in controlling the band structure at the discussed length scales. The observations recorded here will be important for future developments of magnetic antidot based magnonic crystals and waveguides. V C 2013 AIP Publishing LLC. [http://dx

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“…9 When applying an in-plane magnetic field H along a high symmetry direction we find two different spin wave modes extending through the lattice instead of the one recently found in pure Py antidot lattices. 5,[10][11][12] Depending on the eigenfrequency two modes exist in parallel stripes going either through Co nanodisks or the Py effective stripes existing between them. Such binary component magnetic lattices thus offer additional degrees of freedom to control magnonic devices if compared with the previously published antidot lattices (ADLs) incorporating etched holes.…”

mentioning

confidence: 99%

“…Such binary component magnetic lattices thus offer additional degrees of freedom to control magnonic devices if compared with the previously published antidot lattices (ADLs) incorporating etched holes. 5,[10][11][12] Samples were based on 300 lm by 120 lm large Py mesas [see Fig. 1(b)] of 26 nm thickness deposited on a semiinsulating GaAs substrate using electron gun evaporation.…”

mentioning

confidence: 99%

Spatial control of spin-wave modes in Ni80Fe20 antidot lattices by embedded Co nanodisks

Duerr

Madami

Neusser

et al. 2011

Applied Physics Letters

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Combined all-electrical spin-wave and micro-focused Brillouin light scattering spectroscopies have been used to study spin-wave eigenmodes in bicomponent lattices formed by periodic Co nanodisks introduced in nanotroughs etched into a thin Ni 80 Fe 20 film. We find two characteristic spin-wave modes extending through the lattice perpendicular to the applied field. Their spatial positions depend crucially on the Co nanodisks as they reverse locally the polarity of the internal field. Embedded nanodisks are found to offer control of spin waves at nearly the same eigenfrequency in periodically patterned magnetic devices and magnonic crystals.

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Field tunable localization of spin waves in antidot arrays

Cited by 33 publications

References 17 publications

Artificial ferroic systems: novel functionality from structure, interactions and dynamics

Artificial ferroic systems: novel functionality from structure, interactions and dynamics

Effect of hole shape on spin-wave band structure in one-dimensional magnonic antidot waveguide

Spatial control of spin-wave modes in Ni80Fe20 antidot lattices by embedded Co nanodisks

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