Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods

Abstract In situ growth of pyrochlore iridate thin films has been a long-standing challenge due to the low reactivity of Ir at low temperatures and the vaporization of volatile gas species such as IrO3(g) and IrO2(g) at high temperatures and high P O2. To address this challenge, we combine thermodyn...

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Autores principales:	Lu Guo, Shun-Li Shang, Neil Campbell, Paul G. Evans, Mark Rzchowski, Zi-Kui Liu, Chang-Beom Eom
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
Acceso en línea:	https://doaj.org/article/f1c00b0ff7004bca818d01a8491d5078
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spelling	oai:doaj.org-article:f1c00b0ff7004bca818d01a8491d50782021-12-02T17:19:13ZSearching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods10.1038/s41524-021-00610-92057-3960https://doaj.org/article/f1c00b0ff7004bca818d01a8491d50782021-09-01T00:00:00Zhttps://doi.org/10.1038/s41524-021-00610-9https://doaj.org/toc/2057-3960Abstract In situ growth of pyrochlore iridate thin films has been a long-standing challenge due to the low reactivity of Ir at low temperatures and the vaporization of volatile gas species such as IrO3(g) and IrO2(g) at high temperatures and high P O2. To address this challenge, we combine thermodynamic analysis of the Pr-Ir-O2 system with experimental results from the conventional physical vapor deposition (PVD) technique of co-sputtering. Our results indicate that only high growth temperatures yield films with crystallinity sufficient for utilizing and tailoring the desired topological electronic properties and the in situ synthesis of Pr2Ir2O7 thin films is fettered by the inability to grow with P O2 on the order of 10 Torr at high temperatures, a limitation inherent to the PVD process. Thus, we suggest techniques capable of supplying high partial pressure of key species during deposition, in particular chemical vapor deposition (CVD), as a route to synthesis of Pr2Ir2O7.Lu GuoShun-Li ShangNeil CampbellPaul G. EvansMark RzchowskiZi-Kui LiuChang-Beom EomNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Computer softwareQA76.75-76.765ENnpj Computational Materials, Vol 7, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 Lu Guo Shun-Li Shang Neil Campbell Paul G. Evans Mark Rzchowski Zi-Kui Liu Chang-Beom Eom Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods
description	Abstract In situ growth of pyrochlore iridate thin films has been a long-standing challenge due to the low reactivity of Ir at low temperatures and the vaporization of volatile gas species such as IrO3(g) and IrO2(g) at high temperatures and high P O2. To address this challenge, we combine thermodynamic analysis of the Pr-Ir-O2 system with experimental results from the conventional physical vapor deposition (PVD) technique of co-sputtering. Our results indicate that only high growth temperatures yield films with crystallinity sufficient for utilizing and tailoring the desired topological electronic properties and the in situ synthesis of Pr2Ir2O7 thin films is fettered by the inability to grow with P O2 on the order of 10 Torr at high temperatures, a limitation inherent to the PVD process. Thus, we suggest techniques capable of supplying high partial pressure of key species during deposition, in particular chemical vapor deposition (CVD), as a route to synthesis of Pr2Ir2O7.
format	article
author	Lu Guo Shun-Li Shang Neil Campbell Paul G. Evans Mark Rzchowski Zi-Kui Liu Chang-Beom Eom
author_facet	Lu Guo Shun-Li Shang Neil Campbell Paul G. Evans Mark Rzchowski Zi-Kui Liu Chang-Beom Eom
author_sort	Lu Guo
title	Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods
title_short	Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods
title_full	Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods
title_fullStr	Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods
title_full_unstemmed	Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods
title_sort	searching for a route to synthesize in situ epitaxial pr2ir2o7 thin films with thermodynamic methods
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f1c00b0ff7004bca818d01a8491d5078
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Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods

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