Thermal analysis on MnBi in high magnetic fields up to 45 T

Mitsui, Yoshifuru; Ikehara, Yuki; Watanbe, Kazuo; Choi, Eun Sang; Palm, E. C.; Koyama, K.

doi:10.3938/jkps.62.1769

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…где T 0 -температура фазового равновесия, T c -точка Кюри, меняется от < 1 к > 1 или наоборот. Такими сплавами являются, например, Fe-Ni [29], Fe-Rh, Fe-Co. В сплаве Fe-Co при повышении содержания кобальта температура Кюри увеличивается более интенсивно, чем температура фазового равновесия (Табл. 1).…”

Section: фазовые превращения в условиях магнитного поляunclassified

“…Можно видеть, что в чистом железе температура фазового перехода смещается на 7 градусов Кельвина, тогда как в сплаве Fe -30 (ат.%) Co на 24 [25]. Необходимо отдельно рассмотреть серию исследований выполненных на системе MnBi [29,30] Термодинамический подход хорошо описывает наблюдаемые во многих материалах явления, с качественной точки зрения. Недостатком является, то, что расчетные и экспериментальные величины смещения температуры не всегда хорошо согласуются между собой [24,25,27].…”

Section: фазовые превращения в условиях магнитного поляunclassified

“…Фрагмент фазовой диаграммы MnBi в магнитном поле. Пунктирная линия -экстраполяция, рассчитанная с использованием метода наименьших квадратов с данными для B ≤ 14 Тл[29].…”

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“…Fragment of phase diagram MnBi in magnetic field. The dashed line is an extrapolation calculated using the least squares method with data for B ≤ 14 T[29].…”

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confidence: 99%

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Effect of high magnetic field on phase and structural transformations in ferromagnetic alloys. Review

Milyutin¹,

Gervasyeva²

2018

LoM

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Review of relevant research about the effect of high DC magnetic field on structural and phase transformations in different ferromagnetic alloys are presented. Main experimental results of simultaneous impact high temperature and magnetic field with induction up to 45 T on alloys Fe-C, Fe-Co, Fe-Si, Mn-Bi, Fe-Ni, Ni-Co and other are presented. The main high magnetic field effect on a phase transformation is equilibrium temperature changing, which reaches tens degrees. Modern views about cause of such effect, which consist in changing of thermodynamic conditions of transformation under external magnetic field due different magnetic properties between parent and appearing phase are described. In the theoretical and experimental determination of the phase transformation temperature shift magnitude in most cases there is a significant discrepancy. The probable causes such discrepancy are discussed. Moreover, review of results on investigations effect of magnetic field on structure transformations; in particular recovery and recrystallization in cold-rolled ferromagnetic alloys are presented. It is shown, that magnetic field retards recovery process and furthermore promotes preferential formation of certain texture components. Nowadays there is no consensus in the scientific literature on the nature of the observed effects. In this paper, critical analyses of the approaches proposed by different authors to the interpretation of experimental results are presented. The current state of the problem is described; in conclusion, the prospects for further studies of thermally activated processes in the conditions of application of a high DC magnetic field are indicated.

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Section: фазовые превращения в условиях магнитного поляunclassified

unclassified

“…Fragment of phase diagram MnBi in magnetic field. The dashed line is an extrapolation calculated using the least squares method with data for B ≤ 14 T[29].…”

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confidence: 99%

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Effect of high magnetic field on phase and structural transformations in ferromagnetic alloys. Review

Milyutin¹,

Gervasyeva²

2018

LoM

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“…Awaji et al developed the DTA system used with magnetic fields up to 14 T [24]. Recently, high-field DTA (HF-DTA) equipment for fields up to 45 T has been developed by Mitsui et al [25]. The MFE in synthesis processes and phase equilibria has been studied for high-T C superconductors [26,27], and ferromagnetic MnBi [28][29][30] employing HF-DTA.…”

Section: Introductionmentioning

confidence: 98%