L
L. P. Romaka
Researcher at Lviv University
Publications - 179
Citations - 921
L. P. Romaka is an academic researcher from Lviv University. The author has contributed to research in topics: Ternary operation & Crystal structure. The author has an hindex of 15, co-authored 163 publications receiving 838 citations. Previous affiliations of L. P. Romaka include Centre national de la recherche scientifique.
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Phase equilibria, formation, crystal and electronic structure of ternary compounds in Ti–Ni–Sn and Ti–Ni–Sb ternary systems
Vitaliy Romaka,Peter Rogl,L. P. Romaka,Yu. Stadnyk,N. Melnychenko,A. Grytsiv,Matthias Falmbigl,N. E. Skryabina +7 more
TL;DR: The phase equilibria of the Ti-Ni-Sn and TiNi-Sb ternary systems have been studied in the whole concentration range by means of X-ray and EPM analyses at 1073 K and 873 K, respectively.
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Peculiarities of structural disorder in Zr- and Hf-containing Heusler and half-Heusler stannides
TL;DR: In this article, the structural phase transition in half-Heusler stannides was studied using XRD and EPM analyses, electrical and magnetic properties measurement, and the influence of the disordering and defects in crystal structure on the physical properties was analyzed.
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Crystal structure, electrical transport properties and electronic structure of the VFe1−xCuxSb solid solution
Yu. Stadnyk,Andriy Horyn,Vladimir Sechovsky,L. P. Romaka,Ya. Mudryk,Janusz Tobola,T. Stopa,Stanislaw Kaprzyk,A. V. Kolomiets +8 more
TL;DR: In this article, the electrical transport properties, crystal structure and electronic structure of the VFe 1− x Cu x Sb solid solution (0.1, 0.2) were studied.
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Peculiarities of thermoelectric half-Heusler phase formation in Gd-Ni-Sb and Lu-Ni-Sb ternary systems
Vitaliy Romaka,L. P. Romaka,Andriy Horyn,Peter Rogl,Yu. Stadnyk,N. Melnychenko,M. Orlovskyy,Vladimir Krayovskyy +7 more
TL;DR: The phase equilibria in the GdNiSb and Lu-Ni-Sb ternary systems were studied at 873 K by X-ray and metallographic analyses in the whole concentration range.
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Crystal structure and physical properties of (Ti,Sc)NiSn and (Zr,Sc)NiSn solid solutions
Andriy Horyn,O. I. Bodak,L. P. Romaka,Yu. K. Gorelenko,Andriy V. Tkachuk,V. Davydov,Yu. Stadnyk +6 more
TL;DR: In this paper, the stability ranges of the limited solubility for these phases were established and a gradual semiconductor-semimetal transition was observed in the resistivity when increasing the Sc content for these substitutional series of alloys.