Microwires enabled metacomposites towards microwave applications

Luo, Yang; Qin, Faxiang; Scarpa, Fabrizio; Carbonell, J.; Ipatov, M.; Zhukova, V.; González, J.; Panina, L.V.; Peng, Hua-Xin

doi:10.1016/j.jmmm.2016.04.089

Cited by 25 publications

(4 citation statements)

References 46 publications

(60 reference statements)

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“…These materials offer important benefits in terms of miniaturization, as well as of new application opportunities for much needed state-of-the-art purposes, such as micro and nano-sensing devices [ 6 ], medical applications [ 7 , 8 , 9 ], information technology engineering applications in magnetic logic devices [ 10 ], flexible electronics, various functional devices and smart structures [ 11 ]. They could also be employed as key elements in miniaturized tunable metamaterials, adjustable microwave materials, as well as self-sensing micro and nanomaterials [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Stochastic Magnetization Switching in Rapidly Solidified (Co0.94Fe0.06)72.5Si12.5B15 Amorphous Submicronic Wires

et al. 2022

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Submicrometric magnetic amorphous wires are good candidates for future development of miniaturized sensors and magnetic logic applications. Here we report the results of an in-depth investigation of magnetization switching in rapidly solidified nearly zero magnetostrictive (Co0.94Fe0.06)72.5Si12.5B15 amorphous samples with diameters of the actual magnetic wires between 300 and 450 nm. All samples were found to be magnetically bistable, displaying characteristic rectangular hysteresis loops. This shows that magnetization reversal occurs through the depinning and subsequent propagation of a magnetic domain wall, whose velocity depends on the applied field and on the sample dimensions. The results of this study reveal stochastic nonlinear dependencies of both the magnetic switching field and the domain wall velocity on the sample diameter. The analysis of the potential causes, which include nonlinear residual stresses, fluctuations in wire dimensions (metal and glass), and competing magnetic anisotropies of different origins, show that a combination of all three factors could lead to the observed stochastic behavior. Calculated values of the switching field, which consider only changes in the wire dimensions, indicate that such influence alone cannot account for the strong nonlinearities. The results are important for the applications of such ultrathin cylindrical magnetic amorphous wires.

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Section: Introductionmentioning

confidence: 99%

Stochastic Magnetization Switching in Rapidly Solidified (Co0.94Fe0.06)72.5Si12.5B15 Amorphous Submicronic Wires

et al. 2022

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“…The effective permittivity of composites also depends on the wire magnetic configuration. Such composites are of interest as tunable electromagnetic materials [25,26].…”

Section: Introductionmentioning

confidence: 99%

Functional magnetoelectric composites with magnetostrictive microwires

et al. 2019

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This paper discusses the electric polarization properties of ferromagnetic microwires at microwave frequencies. At the vicinity of the antenna resonance, a strong magnetic control of the wire polarization is possible owing to the magnetoimpedance (MI) effect. In order to realize efficient tunable properties, magnetic microwires of Co-rich compositions in amorphous state are considered. The absence of the crystalline structure is an important condition to establish welldefined magnetic anisotropies of small magnitudes, which results in the magnetization processes sensitive to the external parameters such as a magnetic field and a mechanical stress. Tunable soft magnetic properties of amorphous microwires are responsible for the MI effect, which can be observed at high frequencies (1-10 GHz). Here we demonstrate that the electric polarization of a microwire depends on its impedance and, hence, can be modulated changing the wire magnetization state in response to the application of a magnetic field and a mechanical stress. The polarization problem is treated theoretically by solving the scattering problem from a cylindrical ferromagnetic wire with the impedance boundary conditions. The modelling results agree well with the available experimental data.

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“…The induced helical anisotropy not only increases the relative change in impedance (MI ratio) up to 200% (from 10% in as-prepared state) in the lowfield region, but makes it possible to realize highly stresssensitive MI. This has a potential for applications in miniature stress sensors, in particular, for embedded sensing techniques [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Stress Effects on Magnetic Properties of Amorphous Microwires Subjected to Current Annealing

et al. 2018

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Abstract. Effects of current annealing on magnetic hysteresis properties and magnetoimpedance (MI) of glass-coated amorphous microwires with nominal composition of Co71Fe5B11Si10Cr3 and small positive magnetostriction were investigated with the purpose to control the magnetic anisotropy. We have demonstrated that current annealing can produce a controllable change in the easy anisotropy direction from almost axial to circular, depending on the annealing time. The induced magnetization configuration is very sensitive to the applied tensile stress. The combination of positive magnetostriction and helical anisotropy makes it possible to realise large stress-magnetoimpedance (S-MI) effect without use of any dc bias fields owing to the directional change in magnetization. This is especially important for microwave frequency S-MI effect and can be very interesting for developing stress-sensors operating at the high frequency region.

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Microwires enabled metacomposites towards microwave applications

Cited by 25 publications

References 46 publications

Stochastic Magnetization Switching in Rapidly Solidified (Co0.94Fe0.06)72.5Si12.5B15 Amorphous Submicronic Wires

Stochastic Magnetization Switching in Rapidly Solidified (Co0.94Fe0.06)72.5Si12.5B15 Amorphous Submicronic Wires

Functional magnetoelectric composites with magnetostrictive microwires

Stress Effects on Magnetic Properties of Amorphous Microwires Subjected to Current Annealing

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