Structural and magnetic features of solid-phase transformations in Mn/Bi and Bi/Mn films

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1134/S0021364016040111

Аннотация: 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 similar to 120A degrees C and the Mn and Bi layers react completely at 300A degrees C. The resulting alpha-MnBi(001) samples have a large perpendicular magnetic anisotropy (K (u) a parts per thousand integral 1.5 x 10(7) erg/cm(3)) and a coercive force H > H (C) similar to 3 kOe. In contrast to Mn/Bi, the ferromagnetic alpha-MnBi phase in Bi/Mn films is not formed even at annealing processes up to 400A degrees 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 (similar to 120A degrees C) structural transformation in the Mn-Bi system.

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Издание

Журнал: JETP LETTERS

Выпуск журнала: Vol. 103, Is. 4

Номера страниц: 254-259

ISSN журнала: 00213640

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Myagkov V.G. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Bondarenko G.N. (Siberian Federal University)
  • Bykova L.E. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Yakovchuk V.Y. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Zhigalov V.S. (Siberian State Aerospace University)
  • Volochaev M.N. (Siberian State Aerospace University)
  • Matsynin A.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Tambasov I.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Seredkin V.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Patrin G.S. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)

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