Magnetostriction and electrical resistivity of Mn doped Fe<sub>81</sub>Ga<sub>19</sub>alloys

Xu, Shuang; Zhang, H P; Q, Wang W; Guo, Shihai; Zhu, Weiwei; Zhang, Y H; Wang, X L; Zhao, Dongliang; Chen, J L; Wu, Guangheng

doi:10.1088/0022-3727/41/1/015002

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…The alloy based magnetostrictive material, Galfenol, offers several advantages over the costly, rare-earth based Terfenol-D and therefore, Ga-Fe alloy has been studied as an alternative magnetostrictive material for various applications [1][2][3][4][5][6][7]. The amplitude of the magnetostriction coefficient (λ), ranging from 200 to 400 ppm is reported for single crystal Galfenol and 80-270 ppm for thin film and polycrystalline materials, and the values strongly depend on the chemical compositions of the material [8][9][10][11]. Even though Galfenol-based materials exhibit better magnetostriction at low fields, the use of the material is restricted only for few applications due to the eddy current losses when operated at moderately low frequencies because of its low electrical resistivity.…”

Section: Introductionmentioning

confidence: 99%

Effect of size and site preference of trivalent non-magnetic metal ions (Al³⁺, Ga³⁺, In³⁺) substituted for Fe³⁺on the magnetostrictive properties of sintered CoFe₂O₄

Anantharamaiah

Joy

2017

J. Phys. D: Appl. Phys.

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The influence of size and crystallographic site preference of three non-magnetic isovalent metal ions of larger (In 3+ ), comparable (Ga 3+ ) and smaller (Al 3+ ) sizes, substituted for Fe 3+ in the spinel lattice of CoFe 2 O 4 on its magnetostrictive properties is compared. For the different compositions in CoFe 2−x M x O 4 (M = In 3+ , Ga 3+ , Al 3+ and 0 ⩽ x ⩽ 0.3), significant changes in the structural and magnetic parameters are observed with the degree of substitution, due to the size and site preferences. Magnetic and Raman spectral studies revealed that Al 3+ is substituted for Fe 3+ at both octahedral and tetrahedral sites for all compositions, whereas In 3+ and Ga 3+ are substituted for Fe 3+ at the tetrahedral site only for x ⩽ 0.2 and partly at the octahedral site for x > 0.2. Regardless of the differences in the ionic size, site preference and the magnetic properties, compositions in all three series with x = 0.1 showed almost equal magnitude of maximum magnetostriction (λ max = ~230 ppm), marginally higher than that of x = 0 (217 ppm). However, at higher substituted compositions, λ max is decreased with x, but the decrease is much faster for the Al-substituted compositions. The maximum strain sensitivity, [dλ/dH] max , is also found to be comparable for all three compositions. The comparable magnetostriction characteristics and high strain at low magnetic fields for different substituted compositions at low levels of substitution are attributed to the local structural distortions associated with the inhomogeneous distribution of the substituted ions in the spinel ferrite lattice. The studies suggest ways to optimise the magnetostriction properties of properly substituted sintered cobalt ferrite for applications in sensors and actuators.

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Section: Introductionmentioning

confidence: 99%

Effect of size and site preference of trivalent non-magnetic metal ions (Al³⁺, Ga³⁺, In³⁺) substituted for Fe³⁺on the magnetostrictive properties of sintered CoFe₂O₄

Anantharamaiah

Joy

2017

J. Phys. D: Appl. Phys.

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“…Given the significant difference in the size of the atoms, this leads to the appearance of lattice distortions, which reduces the electron mean free path and increases the electrical resistivity [40]. Moreover, a further increase in the ρ value is possible due to the alloying of the binary alloy with various elements such as Mn [41] or RE [36]. For example, the addition of 0.2% Tb leads to an increase of more than 30% compared to a binary alloy (Table 1).…”

Section: Alloymentioning

confidence: 99%

Prospects of Using Fe-Ga Alloys for Magnetostrictive Applications at High Frequencies

Milyutin,

Bureš,

Fáberová

2023

Condensed Matter

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Fe-Ga is a promising magnetostrictive rare-earth free alloy with an attractive combination of useful properties. In this review, we consider this material through the lens of its potential use in magnetostrictive applications at elevated frequencies. The properties of the Fe-Ga alloy are compared with other popular magnetostrictive alloys. The two different approaches to reducing eddy current losses for such applications in the context of the Fe-Ga alloy, in particular, the fabrication of thin sheets and Fe-Ga/epoxy composites, are discussed. For the first time, the results of more than a decade of research aimed at developing each of these approaches are analyzed and summarized. The features of each approach, as well as the advantages and disadvantages, are outlined. In general, it has been shown that the Fe-Ga alloy is the most promising magnetostrictive material for use at elevated frequencies (up to 100 kHz) compared to analogs. However, for a wide practical application of the alloy, it is still necessary to solve several problems, which are described in this review.

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“…The composition x = 0.8 shows the highest magnetostriction of 103 ppm for as-cast sample and 188 ppm for DS-treated sample. It should be noted that as for the trace-amount element doped FeGa polycrystalline alloys without treatment of magnetic annealing and prestress during measurement, the reported maximum value of magnetostriction (even DS-treated FeGa alloys) is 160 ppm [29][30][31][32][33][34] . Meanwhile, the Pt doping causes a higher magnetostriction without increasing the saturation field, which can be quantified as dλ/dH, as shown in Fig.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Improved magnetostriction in Galfenol alloys by aligning crystal growth direction along easy magnetization axis

Zhou

Liu

Chen

et al. 2020

Sci Rep

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Galfenol (Iron-gallium) alloys have attracted significant attention as the promising magnetostrictive materials. However, the as-cast Galfenols exhibit the magnetostriction within the range of 20–60 ppm, far below the requirements of high-resolution functional devices. Here, based on the geometric crystallographic relationship, we propose to utilize the 90°-domain switching to improve the magnetostriction of Galfenols by tuning the crystal growth direction (CGD) along the easy magnetization axis (EMA). Our first-principles calculations demonstrate that Pt doping can tune the CGD of Galfenol from [110] to [100], conforming to the EMA. Then, it is experimentally verified in the (Fe0.83Ga0.17)100−xPtx (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) alloys and the magnetostriction is greatly improved from 39 ppm (x = 0, as-cast) to 103 ppm (x = 0.8, as-cast) and 188 ppm (x = 0.8, directionally solidified), accompanying with the increasing CGD alignment along [100]. The present study provides a novel approach to design and develop high-performance magnetostrictive materials.

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Magnetostriction and electrical resistivity of Mn doped Fe₈₁Ga₁₉alloys

Cited by 14 publications

References 16 publications

Effect of size and site preference of trivalent non-magnetic metal ions (Al³⁺, Ga³⁺, In³⁺) substituted for Fe³⁺on the magnetostrictive properties of sintered CoFe₂O₄

Effect of size and site preference of trivalent non-magnetic metal ions (Al³⁺, Ga³⁺, In³⁺) substituted for Fe³⁺on the magnetostrictive properties of sintered CoFe₂O₄

Prospects of Using Fe-Ga Alloys for Magnetostrictive Applications at High Frequencies

Improved magnetostriction in Galfenol alloys by aligning crystal growth direction along easy magnetization axis

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Magnetostriction and electrical resistivity of Mn doped Fe81Ga19alloys

Cited by 14 publications

References 16 publications

Effect of size and site preference of trivalent non-magnetic metal ions (Al3+, Ga3+, In3+) substituted for Fe3+on the magnetostrictive properties of sintered CoFe2O4

Effect of size and site preference of trivalent non-magnetic metal ions (Al3+, Ga3+, In3+) substituted for Fe3+on the magnetostrictive properties of sintered CoFe2O4

Prospects of Using Fe-Ga Alloys for Magnetostrictive Applications at High Frequencies

Improved magnetostriction in Galfenol alloys by aligning crystal growth direction along easy magnetization axis

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Product

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Magnetostriction and electrical resistivity of Mn doped Fe₈₁Ga₁₉alloys

Effect of size and site preference of trivalent non-magnetic metal ions (Al³⁺, Ga³⁺, In³⁺) substituted for Fe³⁺on the magnetostrictive properties of sintered CoFe₂O₄

Effect of size and site preference of trivalent non-magnetic metal ions (Al³⁺, Ga³⁺, In³⁺) substituted for Fe³⁺on the magnetostrictive properties of sintered CoFe₂O₄