- Ferromagnetic resonance in single vertices and 2D lattices macro.
- Publications - Department of Physics of Nanostructures.
- Ferromagnetic Resonance Study on a Grid of Permalloy Nanowires.
- Analysis of ferromagnetic resonance response of square arrays of.
- Resonant subwavelength control of the phase of spin waves reflected.
- (PDF) Nonlinear ferromagnetic resonance in permalloy... - ResearchGate.
- Ferromagnetic resonance property in the magnetic heterostructure with.
- Generation of spin currents by surface plasmon resonance.
- Journal of Physics D: Applied Physics, Volume 52, Number 9... - IOPscience.
- Angular-dependent spin dynamics of a triad of permalloy macrospins.
- Propagation Effects in the Spin-Wave Spectrum of the... - Hindawi.
- Frontiers | Quantum Spin-Wave Materials, Interface Effects and.
- Nano-structured magnetic metamaterial with enhanced nonlinear.
Ferromagnetic resonance in single vertices and 2D lattices macro.
Ten milliliters of ammonia band-pass filter using Fe and Permalloy was fabricated and mea- aqueous solution were then quickly charged into the solution sured [10].... [10] to create most of the However, at ferromagnetic resonance, the ferrite nanoparticles microstrip structure. The 2- m Cu ground plane, 3- m SiO provide a mechanism for one.
Publications - Department of Physics of Nanostructures.
When a magnetic system is excited by a high-frequency EMW, the excited spin system responds with a spin-wave (SW) excitation spectrum, strongly depending on the shape and size of the particles. In nanosize particles of nonellipsoidal geometry, the SW spectra are peculiar, as it is described in Section 21.3.1. FIG. 3. The dependence of the frequency of the fundamental SW mode (ky = 0) on the separation between Py stripes, l, for H0 = 0. The stripe separation is scaled logarithmically. The red full and empty dots are the results of FEM calculations, the blue squares are the results of FDTD calculations, and the lines correspond to the PWM results for two limiting cases which concern the magnetization. Finally, spin-waves (SW) modes excited in a submicron permalloy ellipse with a vortex pair configuration have been addressed by Zhang et al. [15]. Although the magnetic behavior of ellipses has been intensely investigated, stadium-shaped nanoparticles have received less attention.
Ferromagnetic Resonance Study on a Grid of Permalloy Nanowires.
To explore the incidence of geometric parameters on the dynamic response of the system, we have considered permalloy (Py) nanostructures because it is a soft material with negligible magnetocrystalline anisotropy, so the magnetic properties will depend only on its shape anisotropy [30]. Download Download high-res image (123KB).
Analysis of ferromagnetic resonance response of square arrays of.
Ferromagnetic resonance is a powerful method for the study of all classes of magnetic materials. The experimental technique has been used for many decades and is based on the excitation of a magnetic spin system via a microwave (or rf) field.... Investigation of the temperature-dependence of ferromagnetic resonance and spin waves in Co2FeAl0.
Resonant subwavelength control of the phase of spin waves reflected.
Magnetic nanoparticles (MNPs) are a kind of intelligent nanomagnetic material, with small particle size, large specific surface area, magnetic response and superparamagnetism. MNPs may be assembled and positioned under a constant magnetic field, and the heat is absorbed by the electromagnetic wave in the alternating magnetic field.
(PDF) Nonlinear ferromagnetic resonance in permalloy... - ResearchGate.
The microstructure and high frequency properties of facing-target sputtered epitaxial γ'-Fe 4 N films were investigated in detail. It was found that the eddy current in ultrathin γ'-Fe 4 N films is too small to influence the ferromagnetic resonance (FMR) linewidth, where the linewidth is mostly determined by intrinsic damping and the two-magnon scattering (TMS) process. 4.1.6. Nuclear Magnetic Resonance (NMR) Spectroscopy. NMR spectroscopy is an analytical method for the quantitative determination of magnetic nanoparticle structures. NMR spectroscopy is based on magnetic resonance of the nanoparticles' nucleii under a strong magnetic field that induces an energy difference between the down and up spins.
Ferromagnetic resonance property in the magnetic heterostructure with.
Exchange spin waves propagating in magnetic thin films exhibit some dynamic effects, that is, the effects caused solely by the wave propagation. In this paper we put our attention in four phenomena of such kind: the surface (and subsurface) localization, the collapse of the bulk band into a single energy level, the reversal of the mode order in the spin-wave spectrum, and the dynamic. We investigated the microwave-assisted DC voltages of ferromagnetic resonances and exchangedominated standing spin wave excitations in two different in-plane magnetized permalloy thin films via homodyne detection. The line shapes of ferromagnetic resonance spectra and the dispersion curves of ferromagnetic resonance and standing spin wave are in agreement of previous studies, while further.
Generation of spin currents by surface plasmon resonance.
From the classical point of view, spin waves are collective excitations of magnetically ordered materials, that is, waves of precession of the magnetization [1,2], for example in thin magnetic. Of confined structures on spin wave properties are an area of interest for future research. In this work, we present the theoretical and numerical studies of spin wave properties in finite chain of ferromagnetic pillars, where the influence of edge effects and shape anisotropies on dispersion characteristics is taken into account. Magnetic vortex structures are of high technological relevance due to their possible application in magnetic memory. Moreover, investigating magnetization reversal via vortex formation is an important topic in basic research. Typically, such vortices are only investigated in homogeneous magnetic materials of diverse shapes. Here, we report for the first time on micromagnetic simulation of.
Journal of Physics D: Applied Physics, Volume 52, Number 9... - IOPscience.
Influence of the Rest Pulse Duration in Pulsed Electrodeposition of Fe Nanowires (2013) J. Azevedo et al. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY.
Angular-dependent spin dynamics of a triad of permalloy macrospins.
The Influence of Surface Active Substances Various Concentrations on Goethite Nanoparticles Magnetic Properties... Peculiarity of the Ferromagnetic and Spin-Wave Resonance in Exchange-Coupled NiFe/X/NiFe Three Layer Structures (X=Ag, Cu, DyCo)... Influence of Permalloy Layer and Ti Spacer Thicknesses on Magnetic and Magnetoresistive. In 250/20 disks the polarity is conserved and the core is expelled. However, in our experiments the circulation is switched by pulses in disks up to 30 nm thick and 1,100 nm in diameter. This is. Abstract: Micromagnetic simulation enabled us to fully characterize the nucleation and growth of buried domain walls in a layered hard/soft/hard ferromagnetic thin film. Simulation results show that the exchange spring trilayer exhibits a spiral spin magnetic structure and reveals detailed features of field-dependent domain walls evolution.
Propagation Effects in the Spin-Wave Spectrum of the... - Hindawi.
In this paper, we investigate theoretically the interaction of a narrow, subwavelength-width stripe placed above the edge of a homogeneously magnetized film with propagating SWs, study its. Spin waves are locally excited by a dynamic magnetic field generated from a microwave current flowing in a coplanar waveguide placed on top of a Permalloy stripe, which acts as a waveguide for.
Frontiers | Quantum Spin-Wave Materials, Interface Effects and.
Abstract and Figures We report ferromagnetic resonance (FMR) study on a grid formed with permalloy nanowires to understand the spin wave dynamics. The presence of two sets of magnetic nanowires. We report experimental and theoretical studies of spin dynamics in lattice structures of permalloy (Ni 80 Fe 20) nano-ellipses, with four different types of networks including honeycomb and square lattices.The lattices are patterned at the center line of the co-planar wave guide and consist of non-contacting or contacting ellipses. Arrays of nickel and permalloy nanowires have been studied by ferromagnetic resonance for frequencies ranging from 10 MHz up to 40 GHz using a micro-strip transmission line. Measurements of the.
Nano-structured magnetic metamaterial with enhanced nonlinear.
Observation and modelling of magnetic vortex core structure in Permalloy nanoparticles. ×... Localized domain-wall excitations in patterned magnetic dots probed by broadband ferromagnetic resonance. by V. Metlushko, D. Dieleman,... Mode conversion from quantized to propagating spin waves in a rhombic antidot lattice supporting spin wave. Although very weak spin waves are emitted inside the nanospheres, the vortex's spin configurations are maintained as a whole structure, because the field strength is sufficiently small. Broadband magnetization response of equilateral triangular 1000 nm Permalloy dots has been studied under an in-plane magnetic field, applied parallel (buckle state), and perpendicular (Y state) to the triangles base. Micromagnetic simulations identify edge spin waves (E-SWs) in the buckle state as SWs propagating along the two adjacent edges. These quasi one-dimensional spin waves emitted by.
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