Effect of chemical ordering on optical properties of Fe3Si epitaxial films

Описание

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: Moscow International Symposium on Magnetism (MISM); Lomonosov Moscow State Univ, Fac Phys, Moscow, RUSSIA; Lomonosov Moscow State Univ, Fac Phys, Moscow, RUSSIA

Год издания: 2018

Идентификатор DOI: 10.1051/epjconf/201818503014

Аннотация: Optical characteristics (electron energy loss function, optical conductivity σ, permittivity ϵ, refractive index n, extinction coefficient k, and absorption coefficient α) of a 30 nm thick epitaxial Fe3Si iron silicide films grown at different silicon substrate temperature (26, 100, 200, 300 ËC) were determined within E = 0.74-6.46Показать полностьюeV photon energy range using spectroscopic ellipsometry technique. The experimental data are compared to the optical characteristics calculated in the framework of the density functional theory using the GGA-PBE approximation. Variations of the optical characteristics spectra are discussed from the point of view of chemical ordering of DO3 type crystal structure. It is asserted that the electron energy-loss function, optical conductivity and extinction coefficient of the Fe3Si iron silicide films undergo noticeable changes in different spectral ranges over the whole spectrum between 0.74 and 6.46 eV due to variation in the chemical order. Information on the effect of chemical ordering on the optical properties obtained here allows one to carry out quick qualitative analysis of Fe3Si film crystal quality during the synthesis procedures by ellipsometry method in situ. © 2018 The Authors, published by EDP Sciences.

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Издание

Журнал: EPJ Web of Conferences

Выпуск журнала: Vol. 185

Издатель: 2017 Moscow International Symposium on Magnetism, MISM 2017

Авторы

  • Tarasov Ivan (Russian Acad Sci, Fed Res Ctr, KSC, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Popov Zakhar (Natl Univ Sci & Technol MISiS, Moscow 11999, Russia)
  • Visotin Maxim (Russian Acad Sci, Fed Res Ctr, KSC, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Yakovlev Ivan (Russian Acad Sci, Fed Res Ctr, KSC, Siberian Branch, Krasnoyarsk 660036, Russia)
  • Varnakov Sergey (Russian Acad Sci, Fed Res Ctr, KSC, Siberian Branch, Krasnoyarsk 660036, Russia)

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