Surface crystallization and magnetic properties of Fe84.3Cu0.7Si4B8P3 soft magnetic ribbons

Lopatina, Ekaterina Sergeevna; Soldatov, Ivan; Budinsky, Viktoria; Marsilius, Mie; Schultz, L.; Herzer, G.; Schäfer, Rudolf

doi:10.1016/j.actamat.2015.05.051

Cited by 120 publications

(20 citation statements)

References 19 publications

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“…where K(k) is the complete elliptic integral of the first kind [36]. The corresponding magnetization solution is analogous to the well-known onion state [29,31,32] typical for the ring geometry; hence we refer to (12) as the onion state in an elliptical wire, see Fig. 1(b).…”

Section: Equilibrium States Of the Flexible Ferromagnetic Ringmentioning

confidence: 99%

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Magnetization-induced shape transformations in flexible ferromagnetic rings

et al. 2019

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Flexible ferromagnetic rings are spin-chain magnets, in which the magnetic and mechanical subsystems are coupled. The coupling is achieved through the tangentially oriented anisotropy axis. The possibility to operate the mechanics of the nanomagnets by controlling their magnetization is an important issue for the nanorobotics applications. A minimal model for the deformable curved anisotropic Heisenberg ferromagnetic wire is proposed. An equilibrium phase diagram is constructed for the closed loop geometry: (i) A vortex state with vanishing total magnetic moment is typical for relatively large systems; in this case the wire has the form of a regular circle. (ii) A topologically trivial onion state with the planar magnetization distribution is realized in small enough systems; magnetic loop is elliptically deformed. By varying geometrical and elastic parameters a phase transition between the vortex and onion states takes place. The detailed analytical description of the phase diagram is well confirmed by numerical simulations.

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Section: Equilibrium States Of the Flexible Ferromagnetic Ringmentioning

confidence: 99%

“…1. (ii) The onion state is characterized by the planar elliptical deformation of the wire according to (12) with corresponding magnetization distribution φ on (ξ), see Fig. 1.…”

Section: Equilibrium States Of the Flexible Ferromagnetic Ringmentioning

confidence: 99%

Magnetization-induced shape transformations in flexible ferromagnetic rings

et al. 2019

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“…Remote control of the shape and 3D navigation of the soft magnet by means of the external magnetic field stimulate intensive investigations in the area of milli- [4][5][6][7][8] and microrobotics [9][10][11] for flexible electronics and biomedical applications. So far the magneto-sensitive elastomers [12][13][14][15][16][17] are the most studied magnetically responsive flexible materials. The magnetic properties of elastomers are determined by the long range dipole-dipole interaction [18][19][20][21] which results in the relatively large scale of the geometrical deformations.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous deformation of flexible ferromagnetic ribbons induced by Dzyaloshinskii-Moriya interaction

et al. 2019

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Here, we predict the effect of the spontaneous deformation of a flexible ferromagnetic ribbon induced by Dzyaloshinskii-Moriya interaction (DMI). The geometrical form of the deformation is determined both by the type of DMI and by the equilibrium magnetization of the stripe. We found three different geometrical phases, namely (i) the DNA-like deformation with the stripe central line in the form of a helix, (ii) the helicoid deformation with the straight central line and (iii) cylindrical deformation. In the main approximation the magnitude of the DMI-induced deformation is determined by the ratio of the DMI constant and the Young's modulus. It can be effectively controlled by the external magnetic field, what can be utilized for the nanorobotics applications. All analytical calculations are confirmed by numerical simulations.

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“…These alloys usually possess outstanding magnetic properties involving high saturation magnetic flux density ( B S ) and low coercivity ( H C ) 1–4 . Current state of the art nanocrystalline alloys mainly include FeSiBNbCu 5 , FeSiBPCu 6 , FeMBCu (M = Zr, Nb, Hf) 7 and their derivatives which contain a handful of early transition metal elements to promote their crystallization 8 .…”

Section: Introductionmentioning

confidence: 99%

Local structure, nucleation sites and crystallization behavior and their effects on magnetic properties of Fe81Si x B10P8−xCu1 (x = 0~8)

Cao

Wang

Zhu

et al. 2018

Sci Rep

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In this work, an attempt has been made to reveal critical factors dominating the crystallization and soft magnetic properties of Fe81SixB10P8−xCu1 (x = 0, 2, 4, 6 and 8) alloys. Both melt spun and annealed alloys are characterized by differential scanning calorimetry, X-ray diffractometry, Mössbauer spectroscopy, transmission electron microscopy, positron annihilation lifetime spectroscopy and magnetometry. The changes in magnetic interaction between Fe atoms and chemical homogeneity can well explain the variation of magnetic properties of Fe81SixB10P8−xCu1 amorphous alloys. The density of nucleation sites in the amorphous precursors decreases in the substitution of P by Si. Meanwhile, the precipitated nanograins gradually coarsen, but the inhibiting effect of P on grain growth diminishes causing the increase of the crystallinity. Moreover, various site occupancies of Si are observed in the nanocrystallites and the Si occupancy in bcc Fe decreases the average magnetic moment of nanograins. Without sacrificing amorphous forming ability, we can obtain FeSiBPCu nanocrystalline alloy with excellent soft magnetic properties by optimizing the content of Si and P in the amorphous precursors.

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Surface crystallization and magnetic properties of Fe84.3Cu0.7Si4B8P3 soft magnetic ribbons

Cited by 120 publications

References 19 publications

Magnetization-induced shape transformations in flexible ferromagnetic rings

Magnetization-induced shape transformations in flexible ferromagnetic rings

Spontaneous deformation of flexible ferromagnetic ribbons induced by Dzyaloshinskii-Moriya interaction

Local structure, nucleation sites and crystallization behavior and their effects on magnetic properties of Fe81Si x B10P8−xCu1 (x = 0~8)

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