FeNi-based flat magnetoimpedance nanostructures with open magnetic flux: New topological approaches

Kurlyandskaya, G.V.; Членова, А. А.; Férnández, Eduardo F.; Lodewijk, K. J.

doi:10.1016/j.jmmm.2014.10.129

Cited by 24 publications

(17 citation statements)

References 26 publications

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“…These films consist of soft magnetic layers separated by thin highly conductive non-magnetic layers. In particular, recently the non-symmetric multilayered films were attracted interest in connection with a development of magnetic biosensors [20]. Although the MI effect in the multilayers was studied experimentally quite well, its theoretical explanation is still missing.…”

Section: Resultsmentioning

confidence: 99%

Asymmetric Magnetoimpedance in Bimagnetic Multilayered Film Structures

Антонов

Buznikov

2017

Proceedings of the Scientific-Practical Conference "Research and Development - 2016"

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The magnetoimpedance (MI) effect in bimagnetic multilayered film is studied theoretically. The multilayer consists of a repetition of the base three-layered film structure having the soft and hard magnetic layers separated by highly conductive non-magnetic spacer. It is shown that the magnetostatic coupling changes the magnetization distribution in the soft magnetic layers and leads to the asymmetry in the field dependence of the impedance. The influence of the number of layers on the asymmetric magnetoimpedance (AMI) is analyzed. The calculated field and frequency dependences of the impedance describe qualitatively the AMI effect observed in bimagnetic multilayers. The results obtained may be used in the development of sensors of the magnetic field.

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Section: Resultsmentioning

confidence: 99%

Asymmetric Magnetoimpedance in Bimagnetic Multilayered Film Structures

Антонов

Buznikov

2017

Proceedings of the Scientific-Practical Conference "Research and Development - 2016"

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“…Film with FF capillary (concentration 0.04% = 2 g/l) [11] thick cooper conductor may cause formation a thick interface decreasing an effective conductivity and Figure 6. The experimental frequency dependence of the maximum of the total impedance Z of S1-S4 types of measurements.…”

Section: S4mentioning

confidence: 99%

Modelling of thin film magnetoimpedance sensitive element designed for biodetection

2018

Self Cite

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Magnetic soft matter (ferrofluids or ferrogels) is one of the rapidly growing areas of research and applications including magnetic biosensing. Giant magnetoimpedance is the effect with proven capacity to magnetic label detection. In this work, we describe a universal model to simulate conditions of magnetic biodetection and to check its validity with giant magnetoimpedance sensitive element based on magnetic multilayer. Finite element method allows calculations of high-frequency current distribution using the Maxwell's equations taking into account the magnetodynamics of iron oxide water-based ferrofluid in small channels similar to the blood vessels. The modelling was realized with the licensed software Comsol©. The calculations were performed on a specialized engineering server based on four processors Intel Xeon E5 and 124 Gb RAM, adapted for parallel computations and suitable for description of individual layers with nanometer dimensions for the number of elements in the mesh structure above 106 cells. The designed model allows calculations of the current density, the outside magnetic flux, resistivity, etc. for each one of the created cells and total values by integration of sub-domains. One can quantitatively describe concentration of ferrofluid, velocity and pressure in the blood vessel. These changes affecting on the giant magnetoimpedance of the FeNi-based multilayer were both calculated and measured.

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“…In a magnetic biosensor, non-uniform magnetic fields having a complex configuration should be analyzed. In this connection, recently, non-symmetric nanostructured multilayered films have attracted considerable attention [31,32]. Non-symmetric films were obtained by the deposition of top and bottom ferromagnetic parts of a multilayer with different thicknesses.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that the symmetric multilayered films have the highest field sensitivity. At the same time, non-symmetric multilayers allow one to obtain a higher MI response at high frequencies [32].…”

Section: Introductionmentioning

confidence: 99%

Magnetoimpedance in Symmetric and Non-Symmetric Nanostructured Multilayers: A Theoretical Study

Buznikov

Kurlyandskaya

2019

Sensors

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Intensive studies of the magnetoimpedance (MI) effect in nanostructured multilayers provide a good phenomenological basis and theoretical description for the symmetric case when top and bottom layers of ferromagnet/conductor/ferromagnet structure have the same thickness and consist of one magnetic layer each. At the same time, there is no model to describe the MI response in multilayered films. Here, we propose the corresponding model and analyze the influence of the multilayer parameters on the field and frequency dependences of the MI. The approach is based on the calculation of the field distribution within the multilayer by means of a solution of lineralizied Maxwell equations together with the Landau–Lifshitz equation for the magnetization motion. The theoretical model developed allows one to explain qualitatively the main features of the MI effect in multilayers and could be useful for optimization of the film parameters. It might also be useful as a model case for the development of MI magnetic biosensors for magnetic biomarker detection.

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FeNi-based flat magnetoimpedance nanostructures with open magnetic flux: New topological approaches

Cited by 24 publications

References 26 publications

Asymmetric Magnetoimpedance in Bimagnetic Multilayered Film Structures

Asymmetric Magnetoimpedance in Bimagnetic Multilayered Film Structures

Modelling of thin film magnetoimpedance sensitive element designed for biodetection

Magnetoimpedance in Symmetric and Non-Symmetric Nanostructured Multilayers: A Theoretical Study

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