Phase transitions as a tool for tailoring magnetostriction in intrinsic Fe-Ga composites

Palacheva, V.V.; Emdadi, Aliakbar; Emeis, Friederike; Бобриков, И.А.; Балагуров, А.М.; Divinski, Sergiy V.; Wilde, Gerhard; Golovin, I.S.

doi:10.1016/j.actamat.2017.03.049

Cited by 79 publications

(16 citation statements)

References 40 publications

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“…Further details can be found in Refs. 2 The internal friction (IF, or Q -1 ) was obtained by measuring the phase lag φ between the applied cyclic stress and the resulting strain: σ = σ 0 cos(ωt) and ε = ε 0 cos(ωt+φ), correspondingly. ω = 2πf and φ is the phase or the loss angle.…”

Section: Methodsmentioning

confidence: 99%

“…This effect relates to a complex phase transformation sequences in the Fe-27%Ga alloys. Phase transitions in Fe 3 Ga-type alloys were first studied by X-ray diffraction [3][4][5] , and more recently by in situ neutron diffraction 2,6,7 to characterize the bulk alloy. Different ratios between metastable and equilibrium phases characterized by magnetostriction values of different signs vary the magnetostriction values of the alloy, λ S , from positive to negative, including the value of λ S = 0 2 .…”

Section: Introductionmentioning

confidence: 99%

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Anelasticity of Phase Transitions and Magnetostriction in Fe-(27-28%)Ga Alloys

et al. 2018

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Several aspects of anelastic behavior of Fe-(27-28%)Ga-Tb alloys are considered in this paper: (i) the phase transitions from a metastable to an equilibrium phase and phase transitions between equilibrium phases at higher temperatures in as cast alloys, (ii) the nature of corresponding three transient anelastic effects, (iii) the formation of an intrinsic composite microstructure with a different ratio between the bcc-derivative metastable and fcc-derivative equilibrium phases that have different magnetostriction and the effect of alloys doping by Tb to stabilize the metastable phase with high positive values of magnetostriction.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anelasticity of Phase Transitions and Magnetostriction in Fe-(27-28%)Ga Alloys

et al. 2018

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“…The magnetic properties of the FeGa film with different ATs were investigated to realize the thermalreliability. Up to now, no research has been performed on the temperature-dependence of FeGa films [10,14,16]. Figure 2(a,b) show the Ms-T and Hc-T profiles of FeGa films on SCD measured by PPMS technology.…”

Section: Resultsmentioning

confidence: 99%

“…The lower R λ of the FeGa film notably suppresses the reduction of magnetostriction constant at elevated temperatures. For Fe-based alloys, the phases of A2 and D0 3 possess positive magnetostriction compared to the negative magnetostriction of L1 2 phase [14,16,18]. The FeGa film can maintain the bcc phases of A2 and D0 3 below 573 K (Figure 1(f)), which ensures the high-thermal stability of the FeGa film on SCD.…”

Section: Resultsmentioning

confidence: 99%

“…The FeGa film can maintain the bcc phases of A2 and D0 3 below 573 K (Figure 1(f)), which ensures the high-thermal stability of the FeGa film on SCD. The change in magnetization and magnetostriction of FeGa film are determined by the comprehensive effects of bcc and fcc phases [12,16,18]. If there is no phase transformation of bcc phase to fcc phase, the magnetostriction enhancement of Fe-based alloys under thermal treatment can be attributed to the D0 3 nanoclusters embedded in matrix A2 phase [12,19].…”

Section: Resultsmentioning

confidence: 99%

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Coupling of magneto-strictive FeGa film with single-crystal diamond MEMS resonator for high-reliability magnetic sensing at high temperatures

Zhang

Sang

et al. 2020

Materials Research Letters

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Micro-electromechanical systems (MEMS) magnetic sensing at high temperatures over 573 K has not been achieved due to the difficulty in designing the rational interface with strong coupling. Here, a magnetic sensor based on FeGa/single-crystal diamond (SCD) MEMS resonator is realized to circumvent the challenges in magnetic sensing. The present magnetic sensor exhibits a stable high-sensitivity of 7.3 Hz/mT at 573 K and an experimental noise level of 4nT/ √ Hz. The performance exceeds those of reported high-temperature magnetic sensors. This work offers a strategy for developing magnetic sensors with merits super to the existing ones. IMPACT STATEMENT The first high-temperature MEMS magnetic sensor over 573 K super to the present ones is realized by coupling a magneto-strictive FeGa film with a diamond MEMS resonator.

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Twisting and Reverse Magnetic Field Effects on Energy Conversion of Magnetostrictive Wire Metal Matrix Composites

Yang

Wang

Seino

et al. 2020

Physica Rapid Research Ltrs

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Lightweight metal matrix composites have attracted a great attention for their technological application in aerospace, automotive, or sporting goods, and the multifunctionality of these composites will further expand the range of applications. Herein, a kind of lightweight 1–3 magnetostrictive FeCo/AlSi composites is investigated to evaluate the effects of the specific structure design and reverse magnetic field on the energy conversion under compression. The microstructure of the FeCo/AlSi composite before compression was observed, and the results indicate that there is a large bonding interface, which has the benefits of strain/stress transfer. Compared with the FeCo/AlSi composite with straight FeCo wire, a design with twisted FeCo wire significantly enhances the output performance of the magnetostrictive FeCo/AlSi composite. Furthermore, comparison of the output voltage for the FeCo/AlSi composite in the N–S mode (forward magnetization) and N–N mode (reverse magnetization) reveals that the reverse magnetization can improve the efficiency of the energy conversion notably. In addition, the results of the output voltage in the theoretical calculation are virtually consistent with that in practical measurement.

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Phase transitions as a tool for tailoring magnetostriction in intrinsic Fe-Ga composites

Cited by 79 publications

References 40 publications

Anelasticity of Phase Transitions and Magnetostriction in Fe-(27-28%)Ga Alloys

Anelasticity of Phase Transitions and Magnetostriction in Fe-(27-28%)Ga Alloys

Coupling of magneto-strictive FeGa film with single-crystal diamond MEMS resonator for high-reliability magnetic sensing at high temperatures

Twisting and Reverse Magnetic Field Effects on Energy Conversion of Magnetostrictive Wire Metal Matrix Composites

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