Ferromagnetic resonance study of FeCoMoB microwires during devitrification process

Klein, Peter; Varga, R.; Infante, G.; Vázquez, M.

doi:10.1063/1.3689789

Cited by 10 publications

(3 citation statements)

References 43 publications

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“…This cell is typical for GMI experiments [12]. Following the papers where the problem of the skin depth in microwires was studied in details [13][14][15]12] we estimate that the minimum skin depth is about 1 lm for a frequency above 20 MHz. Moreover skin depth depends on applied magnetic field.…”

Section: Methodsmentioning

confidence: 99%

Transformation of magnetic structure in amorphous microwires induced by temperature and high frequency magnetic field

Chizhik

Stupakiewicz

Zablotskii

et al. 2015

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 99%

Transformation of magnetic structure in amorphous microwires induced by temperature and high frequency magnetic field

Chizhik

Stupakiewicz

Zablotskii

et al. 2015

Journal of Alloys and Compounds

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“…We have determined the equilibrium configuration of the magnetization for every applied field using this large value of the damping, which is only available to treat the static cases (the hysteresis loops simulations). It is very important to mention that if one wants to study the domain wall propagation and to determine the domain wall velocity, then one needs to set very low values of the damping (from 0.01 to 0.05) [ 24 ]—this range describes the dynamic case.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Magnetoelastic Anisotropy on the Magnetization Processes in Rapidly Quenched Amorphous Nanowires

Rotarescu,

Corodeanu,

Hlenschi

et al. 2024

Materials

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In this paper, we report for the first time on the theoretical and experimental investigation of Fe77.5Si7.5B15 amorphous glass-coated nanowires by analyzing samples with the same diameters in both cases. The hysteresis curves, the dependence of the switching field values on nanowire dimensions, and the effect of the magnetoelastic anisotropy on the magnetization processes were analyzed and interpreted to explain the magnetization reversal in highly magnetostrictive amorphous nanowires prepared in cylindrical shape by rapid quenching from the melt. All the measured samples were found to be magnetically bistable, being characterized by rectangular hysteresis loops. The most important feature of the study is the inclusion of the magnetoelastic anisotropy term that originates in the specific production process of these amorphous nanowires. The results show that the switching field decreases when the nanowire diameter increases and this effect is due to the reduction in anisotropy and in the intrinsic mechanical stresses. Moreover, the obtained results reveal the importance of factors such as geometry and magnetoelastic anisotropy for the experimental design of cylindrical amorphous nanowires for multiple applications in miniaturized devices, like micro and nanosensors.

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“…[82] For glass-coated microwires where the α damping has been reported to take values in the range from 0.01 to 0.08. [83,84] Under these conditions γ 0 % γ and λ % αγ/M s . Importantly, we consider in principle H dr as the effective field, H eff , acting on the moments to facilitate the understanding.…”

Section: Asymmetric Dw Mobility With the Driving Field Directionmentioning

confidence: 97%

Matteucci Effect and Single Domain Wall Propagation in Bistable Microwire under Applied Torsion

Jiménez

Calle

Fernández-Roldán

et al. 2021

Physica Status Solidi (a)

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On the Matteucci Effect and the Bistable Behavior in Microwires under Applied TorsionThe effects of an electrical current flowing through magnetic nanostructures are connected to several underlying novel phenomena that offer new opportunities for electronics technology or "spintronics." [1] For instance, spin-polarized current gives rise to the spin transfer-torque effect, in which the magnetization orientation in a magnetic layer of a tunnel junction or spin valve can be modified. In magnetic storage technologies, the design of writing and reading magnetic bits in high-speed devices profits of the effect induced by small current to inject domain walls (DWs), or to modify their motion characteristics (i.e., race track memories for magnetic storage or in logic devices). [2][3][4] Most of the studies have been conducted in Permalloy lithography nanostripes, where the shape determines the magnetic anisotropy characteristics. There, vortex and transverse DWs are injected or trapped in artificial notches or by local stray fields. [5,6] In cylindrical nanowires, the geometrical symmetry imposes significant differences. The motion of DWs was numerically solved using the Landau-Lifshitz-Gilbert equation, involving all different energy terms, where transverse or vortex DWs are, respectively, obtained for diameters smaller or larger than the exchange length of the corresponding material. [7] More recently, electrochemically grown cylindrical nanowires with diameter in the range 40-400 nm have been investigated experimentally and modeled by micromagnetic simulations. There, the magnetization reversal is typically activated by the propagation of a vortex DW which due to cylindrical geometry is also labeled as Bloch-point DW. [8,9] With the increase in diameter, as is the case of magnetic microwires fabricated by ultrarapid solidification techniques, new observations and opportunities are offered. They are fabricated in a continuous way with up to hundred-meter length and diameter in the range 0.1-90 μm for the so-called glass-coated microwires [10][11][12] and around 120-180 μm for the in-waterquenched ones. [13] Such ultrarapid solidification techniques introduce very strong mechanical stresses that determine most of the magnetic properties which have been reviewed in other studies. [14][15][16]

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Ferromagnetic resonance study of FeCoMoB microwires during devitrification process

Cited by 10 publications

References 43 publications

Transformation of magnetic structure in amorphous microwires induced by temperature and high frequency magnetic field

Transformation of magnetic structure in amorphous microwires induced by temperature and high frequency magnetic field

The Effect of Magnetoelastic Anisotropy on the Magnetization Processes in Rapidly Quenched Amorphous Nanowires

Matteucci Effect and Single Domain Wall Propagation in Bistable Microwire under Applied Torsion

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