Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


Published online July 14, 2023

Copyright © The Korean Physical Society.

Identification of octahedral configuration in strained SrRuO3 thin films

Tae Hwa Eom, Sang A. Lee, Jae‑Yeol Hwang

J. Korean Phys. Soc. 83(1), 65 - 71 (2023)


Strong modulation between crystal symmetry and the corresponding RuO6 octahedral configurations were verified by structural model calculations based on the diffraction data of 20 individual half-order peaks. This proves that the compressively strained SrRuO3 thin film has pseudo-orthorhombic (monoclinic, P21/m, #11) structure with the BO6 configuration of a+ac at 25 °C and tetragonal (I4/mcm, #140) with the octahedral tilt of a0a0c above 285 °C. The structural phase transition from pseudo-orthorhombic to the tetragonal structure was determined at around 285 °C and epitaxial strain was persistent during the structural phase transition in the fully strained SrRuO3/SrTiO3 heterostructured thin film.