High-Sensitive Sensing Elements Based on Spin Valves with Antiferromagnetic Interlayer Coupling

Наумова, Л. И.; Milyaev, M. A.; Zavornitsin, R. S.; Pavlova, A. Yu.; Maksimova, I. K.; Криницина, Т. П.; Chernyshova, T. A.; Proglyado, V. V.; Ustinov, V. V.

doi:10.1134/s0031918x1907007x

Cited by 17 publications

(10 citation statements)

References 22 publications

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“…Magnetically soft thin FeNi films and FeNi films based multilayered structures are widely used in sensor applications. In many cases, they are used as the main materials of sensitive element for low magnetic field measurements [ 40 , 41 , 42 ]. However, for the functionality of the magnetic field sensors they must be integrated in the electronic circuit with compatible characteristics, for example inductor structures with magnetic films, including FeNi components [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Structural and Magnetic Properties of FeNi Films and FeNi-Based Trilayers with Out-of-Plane Magnetization Component

Svalov

Gorkovenko

Larrañaga

et al. 2022

Sensors

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FeNi films of different thickness and FeNi/(Fe, Co)/FeNi trilayers were prepared by magnetron sputtering deposition onto glass substrates. The permalloy films had a columnar microstructure. The detailed analysis of the magnetic properties based on the magnetic and magneto-optical measurements showed that at thicknesses exceeding a certain critical thickness, hysteresis loops acquire a specific shape and the coercive force of the films increase sharply. The possibility of the estimation of the perpendicular magnetic anisotropy constant using the Murayama equation for the thickness dependence of saturation field was demonstrated. The results of studies of the structural and magnetic properties of FeNi films laminated by Fe and Co spacers with different thickness are presented.

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Section: Resultsmentioning

confidence: 99%

Structural and Magnetic Properties of FeNi Films and FeNi-Based Trilayers with Out-of-Plane Magnetization Component

Svalov

Gorkovenko

Larrañaga

et al. 2022

Sensors

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“…The remagnetization of this layer occurs in fields close to the field of exchange H EX displacement, determined by the exchange interaction at the ferromagnetic/antiferromagnetic boundary. The second ferromagnetic layer is jump-magnetized in a switching field close to H = 0 [15]. The magnitude of the switching field H I is determined by the magnitude of the interaction between the free and fixed layers.…”

Section: Magnetic and Magneto-resistive Propertiesmentioning

confidence: 99%

“…Unidirectional anisotropy is formed during sputtering of the nanostructure in a magnetic field. The direction of the unidirectional anisotropy axis coincides with the direction of the magnetic moment of the adjacent ferromagnetic layer when the nanostructure is sputtered and can be changed by special thermomagnetic treatment [15].…”

Section: Magnetic and Magneto-resistive Propertiesmentioning

confidence: 99%

“…The CoFe/Cu system is attractive for sensor applications due to its high magnetoresistance and small hysteresis loop width, obtained, for example, by using a compound buffer layer Ta/(Ni 80 Fe 20 ) 60 Cr 40 =Ta/PyCr, contributing to the sharp 111 texture. The preparation of spin valves with optimal characteristics requires consideration of magnetic anisotropy, requires careful material selection, buffer layer thicknesses, and thermomagnetic treatment [15].…”

Section: Introductionmentioning

confidence: 99%

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CoFe/Cu/CoFe/FeMn spin valves and CoFe/Cu/CoFe three-layer nanostructures at microwave frequencies

et al. 2022

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The microwave magnetoresistance of CoFe/Cu/CoFe/FeMn spin valves and CoFe/Cu/CoFe three-layer nanostructures with high magnetoresistance has been studied. The transmission and reflection coefficients were measured at the frequency range from 26 to 38 GHz in magnetic fields up to 12 kOe. It is shown that the dependences of the transmission coefficient of spin valves are not symmetric with respect to the H=0 axis, as well as the dependences of magnetoresistance. It is established that the relative changes in the microwave transmission coefficient are 1.5-2 times higher than the relative magnetoresistance measured at direct current. Changes in the reflection coefficient have a smaller value and the opposite sign with respect to changes in the transmission coefficient. Keywords: metal superlattices, spin valves, ferromagnetic resonance, ferromagnetic antiresonance, microwave giant magnetoresistance effect.

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“…Binary NiFe and CoFe, and ternary CoFeNi alloys are used in the composition of FM layers capable of exhibiting the GMR effect of nanostructures [26][27][28]. According to the diagram of the Co-Fe-Ni ternary system [29,30], the Co 70 Fe 20 Ni 10 alloy has saturation magnetostriction λ s close to zero.…”

Section: Introductionmentioning

confidence: 99%

Flexible Spin Valves: Interlayer Interaction and Deformation Sensitivity

Наумова

Chernyshova

Zavornitsyn

et al. 2021

Phys. Metals Metallogr.

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Exchange-coupled spin valves based on ferromagnetic alloys CoFeNi and antiferromagnetic alloy FeMn are obtained on flexible polyimide substrates by magnetron sputtering. The magnetoresistive properties of films and microstrips of spin valves are measured at various degrees of bending deformation of the sample. The behavior of the dependence of the deformation sensitivity of the spin valve on the interaction between the magnetic layers and on the arrangement of the anisotropy axes with respect to the deformation vector is characterized. It is found that the deformation sensitivity decreases with an increase in the interval between the fields of magnetization reversal of the free and fixed layers in the spin valve.

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High-Sensitive Sensing Elements Based on Spin Valves with Antiferromagnetic Interlayer Coupling

Cited by 17 publications

References 22 publications

Structural and Magnetic Properties of FeNi Films and FeNi-Based Trilayers with Out-of-Plane Magnetization Component

Structural and Magnetic Properties of FeNi Films and FeNi-Based Trilayers with Out-of-Plane Magnetization Component

CoFe/Cu/CoFe/FeMn spin valves and CoFe/Cu/CoFe three-layer nanostructures at microwave frequencies

Flexible Spin Valves: Interlayer Interaction and Deformation Sensitivity

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