Control of magneto-static and -dynamic properties by stress tuning in Fe-Si-B amorphous microwires with fixed dimensions

Baraban, I.; Leble, Sergey; Panina, L.V.; Rodionova, Valeria

doi:10.1016/j.jmmm.2018.12.017

Cited by 21 publications

(8 citation statements)

References 21 publications

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“…The loop preserved a rectangular shape but the coercivity decreased from 493.6 to 167.2 A/m. There is also a portion in the hysteresis loop that is associated with the rotational processes in the outer shell caused by micromagnetic structure changes [20]. The comparison between the magnetic properties of glass-coated (S1) and glass-removed (S3) microwires is presented in Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…We will further demonstrate that the ME effect increases when the annealed wires without glass are used (although quite similar for wires annealed either before glass removal or after). The wire magnetic behavior could be further refined by changing the post-production treatments [20,21].…”

Section: Resultsmentioning

confidence: 99%

“…Materials 2020, 13, 916 7 of 12 either before glass removal or after). The wire magnetic behavior could be further refined by changing the post-production treatments [20,21]. The dependencies of the ME coefficient on the frequency of modulating magnetic field for different DC magnetic fields measured for all sandwich samples involving the microwires with different treatments (S1-S5) at room temperature are shown in Figures 6-7.…”

Section: Compositionmentioning

confidence: 99%

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Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

et al. 2020

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The magnetoelectric (ME) response in a trilayer structure consisting of magnetostrictive Fe77.5B15Si17.5 amorphous microwires between two piezoelectric PZT (PbZr0.53Ti0.47O3) layers was investigated. Soft magnetic properties of wires make it possible to operate under weak bias magnetic fields below 400 A/m. Enhanced ME voltage coefficients were found when the microwires were excited by ac magnetic field of a frequency of 50–60 kHz, which corresponded to the frequency of electromechanical resonance. The as-prepared microwires were in a glass coat creating a large thermoelastic stress and forming a uniaxial magnetic anisotropy. The effect of glass-coat removal and wire annealing on ME coupling was investigated. The glass coat not only affects the wire magnetic structure but also prevents the interfacial bonding between the electric and magnetic subsystems. However, after its removal, the ME coefficient increased slightly less than 10%. Refining the micromagnetic structure and increasing the magnetostriction by stress release during wire annealing (before or after glass removal) strongly increases the ME response up to 100 mV/(cm × Oe) and reduces the characteristic DC magnetic field down to 240 A/m. Although the achieved ME coefficient is smaller than reported values for multilayered films with layers of PZT and soft magnetic alloys as Metglass, the proposed system is promising considering a small volume proportion of microwires.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Compositionmentioning

confidence: 99%

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Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

et al. 2020

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“…The mean magnetization value is taken per one electron, so n = 1, as we compute the statistical mean per one electron (see the next section for details). The result is obtained from the array of intersection points of the system (32), which is illustrated as the resulting figure of this section - Figure 2.…”

Section: Heisenberg Partition Function and Exchange Interactions Propmentioning

confidence: 99%

Ferromagnetic Hysteresis by Heisenberg Partition Function and Its Processing Methods in Nanoparticle Magnetization Modeling

Chychkalo¹,

Leble²

2021

Preprint

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The Heisenberg {\it ab initio} theory of magnetization is developed to apply for multilayer nanoparticles. The theory is based on distribution and partition functions modification with account the difference between exchange integral and closest neighbour numbers, that change the system of resulting transcendental equation for magnetization and its reversal to form either a paramagnetic type curve or hysteresis loops patterns. The equations are obtained within the Heisenberg partition function construction by Heitler diagonalization of energy matrix via irreducible representations of permutation symmetry group. A combination with the Gauss distribution gives the explicit expression for the partition function in the asymptotic limit] at large spin range in terms of transcendent function. The exchange integral, as a parameter of the equation of state (material equation) is evaluated from Curie temperature value by means of a formula derived within the presented theory. Methods of data processing from the simultaneous solution of the material equation system are proposed. The multi-valued function of hysteresis loop is found by combination of graphical approach and special procedure for elimination of mistaken peaks and prolapses of the patterns. The theory and computation methods are applied to spherical particles with separate surface layers consideration. The contribution of the surface layers, that are specified by number of closest neighbors and exchange integrals into overall magnetization, is studied for two-layer and three-layer models, that are discussed and compared graphically.

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“…Then, the residual magnetocrystalline anisotropy is small, and the magnetoelastic interactions often play the deciding role in determining the overall magnetic anisotropy energy. This is the basis of magnetic stress-sensing mechanisms with the use of amorphous materials [12,13,14,15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Soft Magnetic Amorphous Microwires for Stress and Temperature Sensory Applications

Panina

Dzhumazoda

Nematov

et al. 2019

Sensors

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Amorphous ferromagnetic materials in the form of microwires are of interest for the development of various sensors. This paper analyzes and argues for the use of microwires of two basic compositions of Co71Fe5B11Si10Cr3 and Fe3.9(4.9)Co64.82B10.2Si12Cr9(8)Mo0.08 as stress/strain and temperature sensors, respectively. The following properties make them suitable for innovative applications: miniature dimensions, small coercivity, low anisotropy and magnetostriction, tunable magnetic structure, magnetic anisotropy, and Curie temperature by annealing. For example, these sensors can be used for testing the internal stress/strain condition of polymer composite materials and controlling the temperature of hypothermia treatments. The sensing operation is based on the two fundamental effects: the generation of higher frequency harmonics of the voltage pulse induced during remagnetization in wires demonstrating magnetic bistability, and magnetoimpedance.

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Control of magneto-static and -dynamic properties by stress tuning in Fe-Si-B amorphous microwires with fixed dimensions

Cited by 21 publications

References 21 publications

Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

Ferromagnetic Hysteresis by Heisenberg Partition Function and Its Processing Methods in Nanoparticle Magnetization Modeling

Soft Magnetic Amorphous Microwires for Stress and Temperature Sensory Applications

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