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This article is cited in 6 scientific papers (total in 6 papers)
CONDENSED MATTER
Structural and magnetic features of solid-phase transformations in Mn/Bi and Bi/Mn films
V. G. Myagkova, L. E. Bykovaa, V. Yu. Yakovchuka, V. S. Zhigalovba, M. N. Volochaevba, A. A. Matsynina, I. A. Tambasova, V. A. Seredkina, G. S. Patrinac, G. N. Bondarenkod a Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia
b Siberian State Aerospace University, pr. Gazety Krasnoyarskii Rabochii, Krasnoyarsk, 660014, Russia
c Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
d Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, 660041, Russia
Abstract:
Solid-phase transformations at different annealing temperatures in Mn/Bi (Mn on Bi) and Bi/Mn (Bi on Mn) films have been studied using X-ray diffraction, electron microscopy, and magnetic measurements. It has been shown that the synthesis of the $\alpha$-MnBi phase in polycrystalline Mn/Bi films begins at a temperature of $\sim$120$^\circ$C and the Mn and Bi layers react completely at 300$^\circ$C. The resulting $\alpha$-MnBi(001) samples have a large perpendicular magnetic anisotropy ($K_u\simeq1.5\times10^7$ erg/cm$^3$) and a coercive force $H>H_C\sim3$ kOe. In contrast to Mn/Bi, the ferromagnetic $\alpha$-MnBi phase in Bi/Mn films is not formed even at annealing processes up to 400$^\circ$C and Mn clusters are formed in a Bi melt. This asymmetry in phase transformations occurs because chemosorbed oxygen existing on the surface of the Mn film in Bi/Mn films suppresses a solid-phase reaction between Mn and Bi. The analysis of the results obtained implies the existence of new low-temperature ($\sim$120$^\circ$C) structural transformation in the Mn-Bi system.
Received: 28.12.2015
Citation:
V. G. Myagkov, L. E. Bykova, V. Yu. Yakovchuk, V. S. Zhigalov, M. N. Volochaev, A. A. Matsynin, I. A. Tambasov, V. A. Seredkin, G. S. Patrin, G. N. Bondarenko, “Structural and magnetic features of solid-phase transformations in Mn/Bi and Bi/Mn films”, Pis'ma v Zh. Èksper. Teoret. Fiz., 103:4 (2016), 280–285; JETP Letters, 103:4 (2016), 254–259
Linking options:
https://www.mathnet.ru/eng/jetpl4870 https://www.mathnet.ru/eng/jetpl/v103/i4/p280
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Abstract page: | 157 | Full-text PDF : | 22 | References: | 60 | First page: | 34 |
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