Geometric control of the magnetization reversal in antidot lattices with perpendicular magnetic anisotropy

Gräfe, Joachim; Weigand, Markus; Träger, Nick; Schütz, Gisela; Goering, E.; Skripnik, Maxim; Nowak, Ulrich; Haering, Felix; Ziemann, P.; Wiedwald, Ulf

doi:10.1103/physrevb.93.104421

Cited by 38 publications

(30 citation statements)

References 45 publications

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“…To check if those predictions match with our computations, we compared the frequencies of FM and CM obtained from the formulas (17) and (18) with the corresponding numerical values readout from the dispersion at k = 0 shown in Fig. 2 and Fig.…”

Section: Resultsmentioning

confidence: 75%

“…(11)(12)(13). In the absence of the external field 0 , the frequency of FM takes partially the same value: 9.29 GHz both for the formula (17) and for the numerical calculations. For the field 0 0 = 100 mT, we obtained the values: 12.38 GHz (from Eq.…”

Section: Resultsmentioning

confidence: 85%

“…2a) shall be different as described by Eqs. (17) and (18), respectively. The eigenfrequency of FM increases linearly with the field, shifted up by frequency independent term γμ 0 2 0 /2 in Eq.…”

Section: Resultsmentioning

confidence: 99%

“…The magnetic configuration can be further controlled by the application of the external bias (magnetic field, temperature gradient, electric field or strain in multiferroic systems) [13,14,15]. This allows using magnetic nanostructures (arrays of wires or dots) of a specific structure for high-density information storage, where the spatial size of information bit is determined by the size of the nanoelement [16,17]. However, in more advanced design even a single magnetic nanoelement (nanowire) can store the sequence of bits.…”

Section: Introductionmentioning

confidence: 99%

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Spin Wave Modes in a Cylindrical Nanowire in Crossover of Dipolar-Exchange Regime

Rychły

Ткаченко

Kłos

et al. 2019

The 37th International Symposium on Dynamical Properties of Solids

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Nanoscale magnetic systems have been studied extensively in various geometries, such as wires of different cross-sections, arrays of wires, dots, rings, etc. Such systems have interesting physical properties and promising applications in advanced magnetic devices. Uniform magnetic nanowires are the basic structures which were broadly investigated. However, some of their dynamical properties, like: (anti)crossing between the spin wave modes and impact of the magnetic field on spin wave spectrum, still need to be exploited. We continue this research by investigation of the spin wave dynamics in solid Ni nanowire of the circular crosssection. We use two approaches: semi-analytical calculations and numerical computations based on finite element method. We solve coupled Landau-Lifshitz and Maxwell equations and consider both magnetostatic and exchange interactions. We identify the dispersion brunches and its (anti)crossing by plotting the spatial profiles of spin wave amplitudes and magnetostatic potential. We also check how we can tune the spectrum of the modes by application of the external magnetic field and how it affects the modes and their dominating type of interaction.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spin Wave Modes in a Cylindrical Nanowire in Crossover of Dipolar-Exchange Regime

Rychły

Ткаченко

Kłos

et al. 2019

The 37th International Symposium on Dynamical Properties of Solids

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“…Later, Pike, Roberts, and collaborators conducted the first experimental procedure on geological samples [16]. Additional studies using FORC were based on nanostructured array systems [17,18,[31][32][33][34], nanocrystalline [35,36], and hard magnetic materials [19]. The FORC measurement starts in magnetic saturation.…”

Section: A First-order Reversal Curve Methodsmentioning

confidence: 99%

Temperature-dependent first-order reversal curve measurements on unusually hard magnetic low-temperature phase of MnBi

et al. 2017

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We have performed first-order reversal curve (FORC) measurements to investigate the irreversible magnetization processes in the low-temperature phase of MnBi. Using temperature-dependent FORC analysis, we are able to provide a clear insight into the effects of microstructural parameters such as grain diameter, shape, and surface composition on the coercivity of nucleation hardened permanent magnet MnBi. FORC diagrams of MnBi show a unique broadening and narrowing of the coercive field distribution with increasing temperature. We were able to microscopically identify the reason for this behavior, based on the shift in the single domain critical diameter from nearly 1 to 2 μm, thereby changing the dependence of coercivity with particle size. This is based on a strong increase in the uniaxial anisotropy constant with increasing temperature. Furthermore, the results also give an additional confirmation that the magnetic hardening in low-temperature phase MnBi occurs due to nucleation mechanisms. In our case, we show that temperature-dependent FORC measurements provide a powerful tool for the microscopic understanding of high-performance permanent magnet systems.

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Direct Imaging of High‐Frequency Multimode Spin Wave Propagation in Cobalt‐Iron Waveguides Using X‐Ray Microscopy beyond 10 GHz

Träger

Gruszecki

Lisiecki

et al. 2020

Physica Rapid Research Ltrs

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The rising research field of magnonics, which is named after the quanta of spin waves, represents a potential candidate for substituting electronic devices as information carriers at the nanoscale. [1-5] Nevertheless, data communication does not represent the only prospective route for magnonics. High-frequency radar systems get increasingly important, e.g., for autonomous driving. This requires very accurate and fast position tracking as well as communication with surrounding vehicles. [6] However, complex electronic building blocks for radar transceivers are vulnerable for nonlinearities at high frequencies and, thus, cause serious problems regarding reliable detection and communication. [6-9] With respect to higher stability, higher data throughput, and faster logic operations at frequencies above 10 GHz, magnonic circuits represent a very promising approach, which allows for substituting several electronic elements in current radar systems. [10] Radar sensors typically require a larger signal bandwidth than communication signals. Thus, high performance in both radar and communication applications requires fine-tuning of signals and advanced bandwidth concepts. Therefore, single-and multi-carrier waveforms between 20 and 30 GHz are very promising for increasing transmission rates and combining communication and sensing. [6] To this end, magnonic waveguides show outstanding characteristics for reliable multimode propagation, [11-14] which could define the backbone of magnonic building blocks in prospective radar applications. [3,15] In this work, we demonstrate the spatially and temporally resolved observation of spin wave excitation and propagation in such magnonic cobalt-iron (CoFe) waveguides at the nanoscale by time-resolved scanning transmission X-ray microscopy (STXM). The large saturation magnetization of CoFe results

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Geometric control of the magnetization reversal in antidot lattices with perpendicular magnetic anisotropy

Cited by 38 publications

References 45 publications

Spin Wave Modes in a Cylindrical Nanowire in Crossover of Dipolar-Exchange Regime

Spin Wave Modes in a Cylindrical Nanowire in Crossover of Dipolar-Exchange Regime

Temperature-dependent first-order reversal curve measurements on unusually hard magnetic low-temperature phase of MnBi

Direct Imaging of High‐Frequency Multimode Spin Wave Propagation in Cobalt‐Iron Waveguides Using X‐Ray Microscopy beyond 10 GHz

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