Strain, Young’s modulus, and structural transition of EuTiO3 thin films probed by micro-mechanical methods
Artikel i vetenskaplig tidskrift, 2023
EuTiO3 (ETO) is a well-known complex oxide mainly investigated for its magnetic properties and its incipient ferro-electricity. In this work, we demonstrate the realization of suspended micro-mechanical structures, such as cantilevers and micro-bridges, from 100 nm-thick single-crystal epitaxial ETO films deposited on top of SrTiO3(100) substrates. By combining profile analysis and resonance frequency measurements of these devices, we obtain the Young’s modulus, strain, and strain gradients of the ETO thin films. Moreover, we investigate the ETO anti-ferro-distortive transition by temperature-dependent characterizations, which show a non-monotonic and hysteretic mechanical response. The comparison between experimental and literature data allows us to weight the contribution from thermal expansion and softening to the tuning slope, while a full understanding of the origin of such a wide hysteresis is still missing. We also discuss the influence of oxygen vacancies on the reported mechanical properties by comparing stoichiometric and oxygen-deficient samples.
Författare
Nicola Manca
Superconductors, oxides and other innovative materials and devices
Gaia Tarsi
Università degli Studi di Genova
Alexei Kalaboukhov
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Francesco Bisio
Superconductors, oxides and other innovative materials and devices
Federico Caglieris
Superconductors, oxides and other innovative materials and devices
Floriana Lombardi
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Daniele Marré
Università degli Studi di Genova
Superconductors, oxides and other innovative materials and devices
Luca Pellegrino
Superconductors, oxides and other innovative materials and devices
APL Materials
2166-532X (eISSN)
Vol. 11 10 101107Oxide Nanoelectromechanical Systems for Ultrasensitive and Robust Sensing of Biomagnetic Fields (Oxinems)
Europeiska kommissionen (EU) (EC/H2020/828784), 2019-05-01 -- 2023-04-30.
Ämneskategorier
Den kondenserade materiens fysik
DOI
10.1063/5.0166762