Ultra-high anisotropic magneto-mechanical damping in Fe-18at.%Ga single crystals

Sun, Meng; Li, Lan; Liu, Caixing; Liu, Xueqing; Jiang, Wenming; Lei, Yawei; Gao, Yue; Cheng, Zhen; Sheng, Zhigao; Wu, Xue-Bing; Fang, Qingming; Liu, Changsong

doi:10.1016/j.scriptamat.2022.114552

Cited by 11 publications

(5 citation statements)

References 34 publications

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“…4a). This effect was carefully studied for Fe-Ga alloys with different Ga content in [25][26][27] to conclude that this effect is so-called Zener relaxation due to reorientation of pair of substitute atoms in solid solution. Earlier we demonstrated excellent coincidence of activation energy for substitution atomic pair reorientation and activation energy of tracer diffusion reported by H. Mehrer et al [28].…”

Section: Resultsmentioning

confidence: 99%

Effect of Fe-Cr Coating on the Fe-Ga Alloy Functional Properties

Palacheva,

Cheverikin,

Chubov

et al. 2023

DDF

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Magnetron sputtering with a chromium-containing Fe-19at.%Cr alloy is used to improve the corrosion resistance of Fe-20at.%Ga alloy. The structure of the 2 μm coated layer and distribution of the elements (Fe, Cr, and Ga) are investigated. The bcc phase (A2 structure) is observed in the sputtered sample by XRD analysis. The corrosion resistance in 3.5%NaCl solution increases 14 times in the sample with 2 μm Fe-Cr coated layer. At the same time, the magnetron sputtering leads to a 10% decrease in magnetostriction and a 20% decrease in damping. This difference is explained by schemes of loading during magnetostriction and damping tests.

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Section: Resultsmentioning

confidence: 99%

Effect of Fe-Cr Coating on the Fe-Ga Alloy Functional Properties

Palacheva,

Cheverikin,

Chubov

et al. 2023

DDF

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“…The Fe–18Ga single crystals with different orientations were investigated, and anisotropic damping was reported in [ 56 ]. The damping of [111]-oriented Fe–Ga single-crystal reaches an unprecedented value of 0.13 (this corresponds to specific damping capacity ψ of ∼0.82), while the damping of [001]-oriented Fe–18Ga single crystal is almost zero ( Figure 15 a).…”

Section: Anelastic Effects In Binary Fe–ga and Ternary Fe–ga-based Al...mentioning

confidence: 99%

“…The inconsistency between Smith and Birchak model [ 5 , 128 ] and existing experimental results for α-Fe-based alloys was partly resolved by Sun et al for Fe–21wt.%Ga–La [ 54 , 56 ]. In ferromagnetic alloys, the damping mechanism is divided into non-magnetic damping (NMD) caused by stress-induced motion of defects, such as point defects, dislocations, grain boundaries, and magneto-mechanical damping (MMD).…”

Section: Anelastic Effects In Binary Fe–ga and Ternary Fe–ga-based Al...mentioning

confidence: 99%

“… ( a ) the variation of damping capacity with strain amplitude for [001]-, [110]-, and [111]-oriented single crystals at RT at 1 Hz; ( b ) magnetomechanical damping against the orientation factor Γ at strain amplitudes of 0.4 × 10 −4 , 1 × 10 −4 , and 4 × 10 −4 ; ( c ) Magnetostrictive curves of [001]-, [110]-, [111]-, and [112]-oriented single crystal samples [ 56 ]. …”

Section: Figurementioning

confidence: 99%

“…Research groups in China have added several important (D0 3 → B2 → A2 transition, distinguished between Zener relaxation in D0 3 and L1 2 phases, etc.) details and proposed new approaches for better understanding amplitude-dependent damping mechanisms in Fe–Ga alloys [ 52 , 53 , 54 , 55 , 56 , 57 ]. Most recently, these results were presented at the 19th ICIFMS (2022, Rome) [ 58 , 59 , 60 , 61 , 62 , 63 , 64 ].…”

Section: Introductionmentioning

confidence: 99%

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Anelastic Effects in Fe–Ga and Fe–Ga-Based Alloys: A Review

Golovin

2023

Materials

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Fe–Ga alloys (GalFeNOLs) are the focus of attention due to their enhanced magneto-elastic properties, namely, magnetostriction in low saturation magnetic fields. In the last several years, special attention has been paid to the anelastic properties of these alloys. In this review, we collected and analyzed the frequency-, amplitude-, and temperature-dependent anelasticity in Fe–Ga and Fe–Ga-based alloys in the Hertz range of forced and free-decay vibrations. Special attention is paid to anelasticity caused by phase transitions: for this purpose, in situ neutron diffraction tests with the same heating or cooling rates were carried out in parallel with temperature dependencies measurements to control ctructure and phase transitions. The main part of this review is devoted to anelastic effects in binary Fe–Ga alloys, but we also consider ternary alloys of the systems Fe–Ga–Al and Fe–Ga–RE (RE—Rare Earth elements) to discuss similarities and differences between anelastic properties in Fe–Ga and Fe–Al alloys and effect of RE elements. We report and discuss several thermally activated effects, including Zener- and Snoek-type relaxation, several transient anelastic phenomena caused by phase transitions (D03 ↔ A2, D03 → L12, L12 ↔ D019, D019 ↔ B2, Fe13Ga9 → L12+Fe6Ga5 phases), and their influence on the above-mentioned thermally activated effects. We also report amplitude-dependent damping caused by dislocations and magnetic domain walls and try to understand the paradox between the Smith–Birchak model predicting higher damping capacity for materials with higher saturation magnetostriction and existing experimental results. The main attention in this review is paid to alloys with 17–20 and 25–30%Ga as the alloys with the best functional (magnetostriction) properties. Nevertheless, we provide information on a broader range of alloys from 6 to 45%Ga. Due to the limited space, we do not discuss other mechanical and physical properties in depth but focus on anelasticity. A short introduction to the theory of anelasticity precedes the main part of this review of anelastic effects in Fe–Ga and related alloys and unsolved issues are collected in summary.

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