High-Frequency Electric Properties of Amorphous Soft Magnetic Cobalt-Based Alloys in the Region of Transition to the Paramagnetic State

Bukreev, D. A.; Moiseev, A. A.; Derevyanko, M. S.; Semirov, A. V.

doi:10.1007/s11182-015-0474-0

Cited by 16 publications

(7 citation statements)

References 10 publications

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“…The length of one batch was as much as several meters with very close parameters of the width and thickness over the whole batch. According to the literature [3,15], the ribbons of such composition have very small negative saturation magnetostriction constant (λ S ~10 −7 ) and therefore they can be used for stress annealing and formation of the transverse magnetic anisotropy suitable for MI applications [13,19,[30][31][32]. Apart from the as-quenched samples in the initial state (AP), the samples that were considered were obtained by the relaxation annealing (AN) at 350 • C during 1 h without load and stress annealing (SA) during 1 h and specific load of 230 MPa.…”

Section: Methodsmentioning

confidence: 99%

Amorphous FeCoCrSiB Ribbons with Tailored Anisotropy for the Development of Magnetic Elements for High Frequency Applications

et al. 2022

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The ferromagnetic resonance (FMR) in the frequency range of 0.5 to 12.5 GHz has been investigated as a function of external magnetic field for rapidly quenched Fe3Co67Cr3Si15B12 amorphous ribbons with different features of the effective magnetic anisotropy. Three states of the ribbons were considered: as-quenched without any treatment; after relaxation annealing without stress at the temperature of 350 °C during 1 h; and after annealing under specific stress of 230 MPa at the temperature of 350 °C during 1 h. For FMR measurements, we adapted a technique previously proposed and tested for the case of microwires. Here, amorphous ribbons were studied using the sample holder based on a commercial SMA connector. On the basis of the measurements of the reflection coefficient S11, the total impedance including its real and imaginary components was determined to be in the frequency range of 0.5 to 12.5 GHz. In order to confirm the validity of the proposed technique, FMR was also measured by the certified cavity perturbation technique using a commercial Bruker spectrometer operating at X-band frequency of 9.39 GHz. As part of the characterization of the ribbons used for microwave measurements, comparative analysis was performed of X-ray diffraction, optical microscopy, transmission electron microscopy, inductive magnetic hysteresis loops, vibrating sample magnetometry, magneto-optical Kerr effect (including magnetic domains) and magnetoimpedance data for of all samples .

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Section: Methodsmentioning

confidence: 99%

Amorphous FeCoCrSiB Ribbons with Tailored Anisotropy for the Development of Magnetic Elements for High Frequency Applications

et al. 2022

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“…Recently, special attention has been paid to the development of magnetic sensors capable to respond on the change of the temperature. Different physical effects were proposed for this kind detectors, including sensors deposited onto flexible substrates [20][21][22]. Based on the presented results, we can propose two-stage object position sensor development as a contribution to the above-mentioned field.…”

Section: Discussionmentioning

confidence: 83%

Multi-Step Magnetization Process of Gd-Co/Co/Cu/Co Thermo-Sensitive Spin Valves

2018

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Magnetic and magnetoresistive properties of the Gd-Co/Co/Cu/Co magnetic type multilayered sensitive spin valve were studied as a function of temperature. It is shown that the appearance of a non-collinear magnetic structure significantly affects the shape of the magnetoresistive hysteresis loop. The characteristic values of the critical field related to the appearance of non-collinear structure depend on the temperature of the spin valve. The obtained results can serve as a basis for the improvements of functional properties and expanding the application areas of magnetic multilayered sensitive elements of the spin valve type; for example, for precise determination of the position of the object.

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“…Nanostructured magnetic materials have become a subject of interest in the last decades. In many senses, their popularity is based on the development of new fabrication techniques and significant improvements of existing synthesis methods [ 1 , 2 , 3 ]. They attract special attention from both the point of view fundamental physical and chemical properties and variety of practical applications [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…In many senses, their popularity is based on the development of new fabrication techniques and significant improvements of existing synthesis methods [ 1 , 2 , 3 ]. They attract special attention from both the point of view fundamental physical and chemical properties and variety of practical applications [ 3 , 4 , 5 ]. Among other systems magnetic nanoparticles were in focus for their investigation in technical devices [ 6 , 7 , 8 ] and medical conditions [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetoimpedance Thin Film Sensor for Detecting of Stray Fields of Magnetic Particles in Blood Vessel

Melnikov

Lepalovskij

Svalov

et al. 2021

Sensors

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Multilayered [FeNi (100 nm)/Cu (3 nm)]5/Cu (500 nm)/[Cu (3 nm)/[FeNi (100 nm)]5 structures were used as sensitive elements of the magnetoimpedance (MI) sensor prototype for model experiments of the detection of magnetic particles in blood vessel. Non-ferromagnetic cylindrical polymer rod with a small magnetic inclusion was used as a sample mimicking thrombus in a blood vessel. The polymer rod was made of epoxy resin with an inclusion of an epoxy composite containing 30% weight fraction of commercial magnetite microparticles. The position of the magnetic inclusion mimicking thrombus in the blood vessel was detected by the measurements of the stray magnetic fields of microparticles using MI element. Changes of the MI ratio in the presence of composite can be characterized by the shift and the decrease of the maximum value of the MI. We were able to detect the position of the magnetic composite sample mimicking thrombus in blood vessels. Comsol modeling was successfully used for the analysis of the obtained experimental results and the understanding of the origin the MI sensitivity in proposed configuration. We describe possible applications of studied configuration of MI detection for biomedical applications in the field of thrombus state evaluation and therapy.

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High-Frequency Electric Properties of Amorphous Soft Magnetic Cobalt-Based Alloys in the Region of Transition to the Paramagnetic State

Cited by 16 publications

References 10 publications

Amorphous FeCoCrSiB Ribbons with Tailored Anisotropy for the Development of Magnetic Elements for High Frequency Applications

Amorphous FeCoCrSiB Ribbons with Tailored Anisotropy for the Development of Magnetic Elements for High Frequency Applications

Multi-Step Magnetization Process of Gd-Co/Co/Cu/Co Thermo-Sensitive Spin Valves

Magnetoimpedance Thin Film Sensor for Detecting of Stray Fields of Magnetic Particles in Blood Vessel

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