Tb solid solution and enhanced magnetostriction in Fe83Ga17 alloys

Wu, Wei; Liu, Jinghua; Jiang, Chengbao

doi:10.1016/j.jallcom.2014.09.151

Cited by 29 publications

(6 citation statements)

References 20 publications

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“…www.nature.com/scientificreports/ Last but not least, let us return to the previously reported methods to improve the magnetostriction of FeGa alloys. The XRD patterns of the FeGa alloys prepared by magnetic annealing 15 , melt-spinning 9,39 , and single crystal growth 27 all indicate the positive correlation between the magnetostriction and the preferred growth direction along [100]. This validates our proposed model and indicates the presence of a common physical mechanism behind these different approaches.…”

Section: X-ray Diffraction Analysissupporting

confidence: 66%

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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Section: X-ray Diffraction Analysissupporting

confidence: 66%

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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“…This enhanced magnetostriction is related to a tetragonal distortion of the matrix related to nanoheterogeneities . Recently, it was discovered that trace rare earth dopants (<1 at%) produce a further fivefold increase, to reach a remarkable value around 1500 ppm, which is over 50 times that of pure iron . This giant magnetostriction is significant for potential applications in microdisplacement control, precision machinery, robotics, underwater communication, and other high‐tech fields.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Trace Rare‐Earth Dopants and Nanoheterogeneities Induces Giant Magnetostriction in Fe‐Ga Alloys

Jiang

et al. 2018

Adv Funct Materials

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The discovery of a tenfold increase in magnetostriction of Fe by alloying nonmagnetic Ga was a breakthrough in magnetostrictive materials. The large magnetostriction is attributed to tetragonal nanoheterogeneities dispersed in the bcc matrix. A further remarkable fivefold increase is achieved by trace rare earth doping (<1 at%) up to a value of ≈1500 ppm, more than 50 times that of pure iron. However, it remains a mystery why trace rare earth dopants can induce such giant magnetostriction. Here, it is found that interaction of rare earth dopants with the nanoheterogeneities produces the giant magnetostriction, through a combination of experimental studies, firstprinciples calculation and phase field simulations. The dopants tend to enter the nanoheterogeneities, increasing their distortion thereby creating a larger tetragonal distortion of the matrix as well as increased magnetocrystalline anisotropy. A mesoscopic model is developed using phase field simulation showing that the bulk tetragonal distortion arises mainly from those nanoheterogeneities with fixed Ga-Ga pairs parallel to the applied magnetic field. Increased tetragonal distortion of the doped nanoheterogeneities leads to further distortion of the matrix. The results deepen the understanding of heterogeneous magnetostriction, and will guide the search for new magnetic materials with giant magnetostriction.

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“…Wu et al [18] found that the magnetostriction improved drastically by Tb solid dissolved in Fe 83 Ga 17 alloys. Moreover, a large number of studies have reported that melt-spun Fe-Ga ribbons have the larger magnetostrictive coefficient than that of the as-cast Fe-Ga system alloy in recent years.…”

Section: Introductionmentioning

confidence: 99%

Influences of rare earth element Ce-doping and melt-spinning on microstructure and magnetostriction of Fe83Ga17 alloy

Yao¹,

Tian²,

Jiang³

et al. 2015

Journal of Alloys and Compounds

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Tb solid solution and enhanced magnetostriction in Fe83Ga17 alloys

Cited by 29 publications

References 20 publications

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

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

Interaction of Trace Rare‐Earth Dopants and Nanoheterogeneities Induces Giant Magnetostriction in Fe‐Ga Alloys

Influences of rare earth element Ce-doping and melt-spinning on microstructure and magnetostriction of Fe83Ga17 alloy

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