Pulsed laser deposition of SrRuO3 thin-films: The role of the pulse repetition rate

H. Schraknepper, C. Bäumer, F. Gunkel, R. Dittmann, R. A. De Souza

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

SrRuO3 thin-films were deposited with different pulse repetition rates, fdep, epitaxially on vicinal SrTiO3 substrates by means of pulsed laser deposition. The measurement of several physical properties (e.g., composition by means of X-ray photoelectron spectroscopy, the out-of-plane lattice parameter, the electric conductivity, and the Curie temperature) consistently reveals that an increase in laser repetition rate results in an increase in ruthenium deficiency in the films. By the same token, it is shown that when using low repetition rates, approaching a nearly stoichiometric cation ratio in SrRuO3 becomes feasible. Based on these results, we propose a mechanism to explain the widely observed Ru deficiency of SrRuO3 thin-films. Our findings demand these theoretical considerations to be based on kinetic rather than widely employed thermodynamic arguments.

Original languageEnglish
Article number126109
JournalAPL materials
Volume4
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016
Externally publishedYes

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