In situ studies of atomic ordering in Fe-19Ga type alloys

Golovin, I.S.; Балагуров, А.М.; Cheng, Wei-Jen; Cifré, J.; Burdin, D. A.; Бобриков, И.А.; Palacheva, V.V.; Samoylova, Nataliya Yu.; Zanaeva, E.N.

doi:10.1016/j.intermet.2018.10.029

Cited by 22 publications

(6 citation statements)

References 17 publications

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“…The real-time study of this transient effect became possible by parallel in situ measurements of internal friction and neutron diffraction (ND) on the same samples Fe–19.1Ga–Tb with the same heating and cooling rate ( Figure 7 c,d only shows ND and IF curves at cooling). Thus, it was confirmed that the transient peak at about 500 °C accompanies the D0 3 ↔ A2 transition recorded by real time ND in the same regime ( Figure 7 c,d) [ 48 ]. Red arrows in Figure 6 d indicate positions of thermally activated Zener peak measured at different frequencies.…”

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

confidence: 57%

“… ( a ) Transient (S2) and Zener (P5) IF peaks in Fe–13Ga [ 30 ]; ( b ) transient IF peaks (D and E) in Fe–18.3Ga [ 119 ]; ( c ) in situ neutron diffraction data suggesting order–disorder transition at ~500 °C (at cooling with 2 K/min); and ( d ) TDIF (cooling with 2 K/min) curves with corresponding PTr peak at ~510 °C [ 48 ]. …”

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

confidence: 99%

“…Our studies of thermally activated (Snoek and Zener relaxations), transient (due to A2 ↔ D0 3 , D0 3 → L1 2 , L1 2 → D0 19 , D0 19 → B2 phase transitions), and amplitude-dependent (damping) effects in Fe–Ga alloys were strengthened by cooperation with colleagues from China, Spain, Switzerland, Taiwan, and the US. Studies of phase transitions were supported by parallel real-time neutron diffraction measurements at JINR, Dubna [ 24 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]. A review of frequency- and temperature-dependent anelastic effects in Fe–Ga alloys was presented by the author of this paper at the 18th International Conference on Internal Friction and Mechanical Spectroscopy (ICIFMS-18, Brazil, 2018).…”

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

confidence: 57%

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

confidence: 99%

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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“…The present paper aims to investigate tracer and interdiffusion in Fe-Ga alloys applying the tracerinterdiffusion couple technique with a sub-goal to test the approach for a system with a strong variation of the molar volume and an expected significant change of the diffusion coefficients. Fe-Ga alloys have attracted attention due to their giant magnetostriction in low magnetic fields [23][24][25] and a number of first-and second-order phase transitions below ~1000 K [26,27]. The Fe-Ga alloys reveal distinct ordering and the type of order depends on temperature and concentration of Ga atoms [25,28].…”

Section: Introductionmentioning

confidence: 99%

Composition dependence of tracer diffusion coefficients in Fe–Ga alloys: A case study by a tracer-diffusion couple method

et al. 2021

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“…Structural phases present in this system are also Ga-dependent. Fe 1−x Ga x alloys (0.11 < x < 0.19) usually present an A2 structure [14], or even the D0 3 nanoprecipitation phase can be obtained under slow cooling [15,16]. Ga-rich Fe 1−x Ga x alloys are unusually reported because their phase structures become very complex when the Ga content exceeds x = 0.2 [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Microstructural contribution to the magnetic anisotropy in Fe 1 − x <

Ramírez,

Moya Riffo,

Ambrosio

et al. 2024

J. Phys. D: Appl. Phys.

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In this study, we present a systematic analysis of the relation between the structural properties and magnetic anisotropies of as-grown and heat-treated polycrystalline Fe1−xGax (0.11 < x < 0.19) thin ﬁlms deposited on glass and Si(100) substrates. The results show that the crystallographic texture of the ﬁlms has a signiﬁcant impact on the evolution of the magnetic anisotropies. The samples grown on glass do not exhibit a preferred texture while, for samples grown on Si(100), the appearance of a weak in-plane fourfold magnetic anisotropy is reported. Such anisotropy is enhanced and better deﬁned in the heat treated samples. Via a phenomenological model we show that this anisotropy has a microstructural origin. These ﬁndings demonstrate the possibility of tuning magnetic anisotropies by growing on diﬀerent substrates and/or performing thermal treatments, which in turn reinforces the possibility of developing smart magnetic switching materials for electronic applications.

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In situ studies of atomic ordering in Fe-19Ga type alloys

Cited by 22 publications

References 17 publications

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

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

Composition dependence of tracer diffusion coefficients in Fe–Ga alloys: A case study by a tracer-diffusion couple method

Microstructural contribution to the magnetic anisotropy in Fe 1 − x <

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