Magnetic impedance of structured film meanders in the presence of magnetic micro- and nanoparticles

Yuvchenko, A. A.; Lepalovskii, V. N.; Vas’kovskii, V. O.; Сафронов, А. П.; Volchkov, S. O.; Kurlyandskaya, G.V.

doi:10.1134/s1063784214020248

Cited by 19 publications

(11 citation statements)

References 16 publications

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“…Although the obtained results are very promising for the design of the magnetic biosensors, at this point we were not able to design GMI prototypes for ferrofluid, flowing magnetic markers, magnetic label, or ferrogel detection [ 40 , 41 , 42 , 43 , 44 ] at elevated temperatures. Design and testing of such prototypes require sets of different additional studies of the temperature dependence of the magnetic properties of magnetic nanoparticles, magnetic markers, ferrofluids, and ferrogels under the conditions of constant weight and nanoparticle concentrations [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Permalloy-Based Thin Film Structures: Magnetic Properties and the Giant Magnetoimpedance Effect in the Temperature Range Important for Biomedical Applications

Членова

Moiseev

Derevyanko

et al. 2017

Sensors

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Permalloy-based thin film structures are excellent materials for sensor applications. Temperature dependencies of the magnetic properties and giant magneto-impedance (GMI) were studied for Fe19Ni81-based multilayered structures obtained by the ion-plasma sputtering technique. Selected temperature interval of 25 °C to 50 °C corresponds to the temperature range of functionality of many devices, including magnetic biosensors. A (Cu/FeNi)5/Cu/(Cu/FeNi)5 multilayered structure with well-defined traverse magnetic anisotropy showed an increase in the GMI ratio for the total impedance and its real part with temperature increased. The maximum of the GMI of the total impedance ratio ΔZ/Z = 56% was observed at a frequency of 80 MHz, with a sensitivity of 18%/Oe, and the maximum GMI of the real part ΔR/R = 170% at a frequency of 10 MHz, with a sensitivity of 46%/Oe. As the magnetization and direct current electrical resistance vary very little with the temperature, the most probable mechanism of the unexpected increase of the GMI sensitivity is the stress relaxation mechanism associated with magnetoelastic anisotropy.

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Section: Resultsmentioning

confidence: 99%

Permalloy-Based Thin Film Structures: Magnetic Properties and the Giant Magnetoimpedance Effect in the Temperature Range Important for Biomedical Applications

Членова

Moiseev

Derevyanko

et al. 2017

Sensors

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“…A later study detected a ferrofluid containing Iron oxide nanoparticles and spherical Iron particles (500 nm) using a MI biosensor made from Permalloy materials [ 103 ]. Yuvchenko et al stated that the number of Iron particles is proportional to the strength of the stray magnetic field [ 103 ]. The more particles, the stronger the stray magnetic field and the greater the MI effect.…”

Section: Magnetic Particles Influencing the Magneto-impedance Effementioning

confidence: 99%

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Sayad

Skafidas

Kwan

2020

Sensors

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Biosensors based on magneto-impedance (MI) effect are powerful tools for biomedical applications as they are highly sensitive, stable, exhibit fast response, small in size, and have low hysteresis and power consumption. However, the performance of these biosensors is influenced by a variety of factors, including the design, geometry, materials and fabrication procedures. Other less appreciated factors influencing the MI effect include measuring circuit implementation, the material used for construction, geometry of the thin film sensing element, and patterning shapes compatible with the interface microelectronic circuitry. The type magnetic (ferrofluid, Dynabeads, and nanoparticles) and size of the particles, the magnetic particle concentration, magnetic field strength and stray magnetic fields can also affect the sensor sensitivity. Based on these considerations it is proposed that ideal MI biosensor sensitivity could be achieved when the sensor is constructed in sandwich thick magnetic layers with large sensing area in a meander shape, measured with circuitry that provides the lowest possible external inductance at high frequencies, enclosed by a protective layer between magnetic particles and sensing element, and perpendicularly magnetized when detecting high-concentration of magnetic particles.

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“…The modelling and simulations were performed by finite element method (FEM) on licensed Comsol Multiphysics software version 5.0 The hardware implementation was realized with computer station having four CPU Intel Xeon E5, RAM 128 Gb and shared-memory parallelism architecture on Ubuntu 14.04 (Linux). The topology of the magnetic multilayered structure was developed in our previous experimental studies [5][6][7]. The GMI elements, the heterogeneous structures consisting of alternating layers of copper and permalloy onto the glass substrate: glass/ [FeNi/Cu_s]4/FeNi/Cu_c/[FeNi/Cu_s]4/FeNi ( Fig.…”

Section: Modellingmentioning

confidence: 99%

Modelling of thin film magnetoimpedance sensitive element designed for biodetection

2018

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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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Magnetic impedance of structured film meanders in the presence of magnetic micro- and nanoparticles

Cited by 19 publications

References 16 publications

Permalloy-Based Thin Film Structures: Magnetic Properties and the Giant Magnetoimpedance Effect in the Temperature Range Important for Biomedical Applications

Permalloy-Based Thin Film Structures: Magnetic Properties and the Giant Magnetoimpedance Effect in the Temperature Range Important for Biomedical Applications

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Modelling of thin film magnetoimpedance sensitive element designed for biodetection

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