Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/218182
Thin-Film Stabilization of a Ferroelectric Orthorhombic α Pr2WO6 Polymorph
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
A new orthorhombic α-Pr2WO6 (PrWO) polymorph with a = 16.57(5) Å, b = 5.52(5) Å and c= 8.73(1) Å, isostructural to α-La2WO6 and α-Nd2WO6, has been stabilized in the form of thin film by pulsed laser deposition on (001)-oriented SrTiO3 substrates. Combining X-ray diffraction pole-figure measurements and transmission electron microscopy (TEM) analysis, the c-axis films gave evidence of the orientations [100]PrWO || [110]STO and [010]PrWO || [110]STO in the plane. Advanced φ-scans and reciprocal space mapping characterizations confirm the existence of the orthorhombic (Pm21n) structure in the film in place to the tetragonal one as also suggested. X-ray thermodiffraction measurements highlight the stability of this polymorph in thin film up to 900°C at least. Optical measurements performed by spectroscopic ellipsometry reveal that the band gap in such 36 nm-thick films (as confirmed by both X-ray reflectivity and TEM measurements) is 2.5 eV. Besides, the local piezoelectric hysteresis loops recorded by using the spectroscopic tool of the piezoresponse force microscopy attest to the robustness of the piezoelectricity and ferroelectricity in these α-Pr2WO6 films. This study demonstrates the existence of a new lead-free ferroelectric material in the series of the α- Ln2WO6 (lanthanide) tungstates which can be considered as a promising candidate for applications in both nanoelectromechanically and energy harvesting systems as well as for integrating optics.
Matèries (anglès)
Citació
Citació
LHEUREUX, Mégane, CHAMBRIER, Marie-hélene, DALLA FRANCESCA, Kevin, VARGAS, Beatriz, YEDRA CARDONA, Lluís, DA COSTA, Antonio, CARLIER, Thomas, BLANCHARD, Florent, ESTRADÉ ALBIOL, Sònia, PEIRÓ MARTÍNEZ, Francisca, ROUSSEL, Pascal, BLACH, Jean-francois, FERRI, Anthony, DESFEUX, Rachel. Thin-Film Stabilization of a Ferroelectric Orthorhombic α Pr2WO6 Polymorph. _Acs Applied Electronic Materials_. 2022. Vol. 4, núm. 11, pàgs. 5234-5245. [consulta: 23 de gener de 2026]. ISSN: 2637-6113. [Disponible a: https://hdl.handle.net/2445/218182]