Phase transitions of Cu.sub.3+x./sub.Si observed by temperature-dependent x-ray powder diffraction

0482845 - FZÚ 2018 RIV GB eng J - Článek v odborném periodiku
Correa, Cinthia Antunes - Poupon, Morgane - Kopeček, Jaromír - Král, Robert - Zemenová, Petra - Lecourt, J. - Barrier, N. - Brázda, Petr - Klementová, Mariana - Palatinus, Lukáš
Phase transitions of Cu_3+xSi observed by temperature-dependent x-ray powder diffraction.
Intermetallics. Roč. 91, Dec (2017), s. 129-139. ISSN 0966-9795. E-ISSN 1879-0216
Grant CEP: GA ČR GC15-08842J
Institucionální podpora: RVO:68378271
Klíčová slova: X-ray powder diffraction * differential scanning calorimetry * phase transitions * Cu3+xSi
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.420, rok: 2017

Phases in the system Cu3+xSi were analyzed by temperature-dependent x-ray powder diffraction and differential scanning calorimetry on samples with nominal composition Cu74Si26 and Cu78Si22 in the temperature range between 30 °C and 700 °C. Contrary to previous works, which report three phases in the system, we identified six distinct phases, labeled, in order of increasing temperature, η‴, η″, η′, η3, η2, η1. All these phases can be indexed with a similar basic unit cell. However, each phase has a different superstructure or modulation vectors.
Trvalý link: http://hdl.handle.net/11104/0278239