Crystallization kinetics of high iron concentration amorphous alloys under high magnetic fields

Onodera, Reisho; Kimura, Shojiro; Watanabe, Kazuo; Yokoyama, Yoshihiko; Makino, Akihiro; Koyama, K.

doi:10.1016/j.jallcom.2014.03.080

Cited by 32 publications

(5 citation statements)

References 17 publications

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“…The large difference in Zeeman energies between the ferromagnetic phase and non-ferromagnetic phase was largely responsible for the change in phase equilibrium. In addition, the solidi cation, crystallization, and the reaction process for the materials were in uenced by the application of a magnetic eld [20][21][22] . In-eld heat treatment (IFHT) effects on the magnetic materials have been studied for the coercivity eld H c of a Nd-Fe-B permanent magnet, magnetostriction of a TbFe 2 -based alloy, segregation of Sn in iron, etc [23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Magnetic-Field-Induced Acceleration of Phase Formation in τ-Mn-Al

et al. 2017

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The phase formation of ferromagnetic L1 0 -MnAl (τ-phase) was accelerated by annealing in magnetic eld. With in-eld annealing at 623 K, the magnetization of the τ-phase annealed at 15 T was a maximum of 72.2 A m 2 /kg at 1.5 T, which is over 4 times larger than that annealed without an external magnetic eld for the same annealing time. On the other hand, the transformation from τ-phase to β-phase was suppressed under magnetic eld. The obtained bulk sample did not show magnetic anisotropy because of the ε-τ solid-state transformation. Obtained results suggested that magnetic eld induced acceleration of transformation was due to the gain of Zeeman energy, which increases the driving force of the ε-τ transformation. [

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Section: Introductionmentioning

confidence: 99%

Magnetic-Field-Induced Acceleration of Phase Formation in τ-Mn-Al

et al. 2017

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“…So far, it has been reported that the reaction or phase transformations from the non-FM to FM phase was accelerated by magnetic fields. 10,11,14,20) Our results showed the two-phase coexistence of the FN and PN phases in Sm 2 Fe 17 N x (x < 3), so that the field-induced phase transformation by ¦G M is a possible mechanism. Assuming a simple model with only the Zeeman effect, ¦G M under H can be written as…”

Section: Discussionmentioning

confidence: 59%

Magnetic Field Effect on Nitrogenation of Sm<sub>2</sub>Fe<sub>17</sub>

et al. 2020

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Nitrogenation of Sm 2 Fe 17 powder was performed under a zero field and a magnetic field of 5 T at 623, 673 and 743 K to clarify the magnetic field effect on nitrogenation. Applying a magnetic field of 5 T induced nitrogenation compared with zero-field nitrogenation, and almost fully nitride Sm 2 Fe 17 N 2.9 was obtained at 743 K. Mössbauer spectroscopy results suggested that a 5-T magnetic field promoted the phase transformation to the fully-nitride Sm 2 Fe 17 N 3 phase. The magnetic field effect was discussed based on the magnetic energy gain and magnetic properties of host Sm 2 Fe 17 and fully nitride Sm 2 Fe 17 N 3 .

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“…The distribution range of grain size narrows. With increasing magnetic flux density, the suppression of coalescence and growth of grains becomes strong and is caused by the reduction in atomic diffusion during crystal growth [22].…”

Section: Resultsmentioning

confidence: 99%