Interface growth of La1.2Sr1.8Mn1.7Ru0.3O7 Ruddlesden-Popper films on SrTiO3

M. Matvejeff; T. Chikyow; M. Lippmaa

doi:10.1016/j.jcrysgro.2008.11.057

Interface growth of La_1.2Sr_1.8Mn_1.7Ru_0.3O₇ Ruddlesden-Popper films on SrTiO₃

M. Matvejeff, T. Chikyow, M. Lippmaa

Research output: Contribution to journal › Article

5 Citations (Scopus)

Abstract

We have fabricated epitaxial La_1.2Sr_1.8Mn_1.7Ru_0.3O₇ thin films with n=2 Ruddlesden-Popper (RP) structure on TiO₂-terminated and SrO-buffered SrTiO₃(0 0 1) single-crystal substrates. It is shown that even small deviation from the narrow growth window results in the nucleation of (AO)₂ double layers in random directions and the loss of the desired structure. The atomic layer ordering at the interface between the thin films and SrTiO₃ substrates was studied by high-pressure, in situ reflection high-energy electron diffraction and transmission electron microscopy. It is demonstrated that growth on TiO₂-terminated SrTiO₃ commences with the nucleation of two perovskite sub-units before the first (AO)₂ double-layer forms. To obtain a sharp RP/SrTiO₃ interface structure, it is necessary to buffer the TiO₂-terminated SrTiO₃ substrate with a sub-unit cell SrO layer before the deposition of the RP film.

Original language	English
Pages (from-to)	1201-1205
Number of pages	5
Journal	Journal of Crystal Growth
Volume	311
Issue number	4
DOIs	https://doi.org/10.1016/j.jcrysgro.2008.11.057
Publication status	Published - 2009 Feb 1
Externally published	Yes

Keywords

A1. RHEED
A1. TEM
A3. PLD
B1. Ruddlesden-Popper
B2. Magnetic materials

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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Matvejeff, M., Chikyow, T., & Lippmaa, M. (2009). Interface growth of La_1.2Sr_1.8Mn_1.7Ru_0.3O₇ Ruddlesden-Popper films on SrTiO₃. Journal of Crystal Growth, 311(4), 1201-1205. https://doi.org/10.1016/j.jcrysgro.2008.11.057

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abstract = "We have fabricated epitaxial La1.2Sr1.8Mn1.7Ru0.3O7 thin films with n=2 Ruddlesden-Popper (RP) structure on TiO2-terminated and SrO-buffered SrTiO3(0 0 1) single-crystal substrates. It is shown that even small deviation from the narrow growth window results in the nucleation of (AO)2 double layers in random directions and the loss of the desired structure. The atomic layer ordering at the interface between the thin films and SrTiO3 substrates was studied by high-pressure, in situ reflection high-energy electron diffraction and transmission electron microscopy. It is demonstrated that growth on TiO2-terminated SrTiO3 commences with the nucleation of two perovskite sub-units before the first (AO)2 double-layer forms. To obtain a sharp RP/SrTiO3 interface structure, it is necessary to buffer the TiO2-terminated SrTiO3 substrate with a sub-unit cell SrO layer before the deposition of the RP film.",

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T1 - Interface growth of La1.2Sr1.8Mn1.7Ru0.3O7 Ruddlesden-Popper films on SrTiO3

AU - Matvejeff, M.

AU - Chikyow, T.

AU - Lippmaa, M.

PY - 2009/2/1

Y1 - 2009/2/1

N2 - We have fabricated epitaxial La1.2Sr1.8Mn1.7Ru0.3O7 thin films with n=2 Ruddlesden-Popper (RP) structure on TiO2-terminated and SrO-buffered SrTiO3(0 0 1) single-crystal substrates. It is shown that even small deviation from the narrow growth window results in the nucleation of (AO)2 double layers in random directions and the loss of the desired structure. The atomic layer ordering at the interface between the thin films and SrTiO3 substrates was studied by high-pressure, in situ reflection high-energy electron diffraction and transmission electron microscopy. It is demonstrated that growth on TiO2-terminated SrTiO3 commences with the nucleation of two perovskite sub-units before the first (AO)2 double-layer forms. To obtain a sharp RP/SrTiO3 interface structure, it is necessary to buffer the TiO2-terminated SrTiO3 substrate with a sub-unit cell SrO layer before the deposition of the RP film.

AB - We have fabricated epitaxial La1.2Sr1.8Mn1.7Ru0.3O7 thin films with n=2 Ruddlesden-Popper (RP) structure on TiO2-terminated and SrO-buffered SrTiO3(0 0 1) single-crystal substrates. It is shown that even small deviation from the narrow growth window results in the nucleation of (AO)2 double layers in random directions and the loss of the desired structure. The atomic layer ordering at the interface between the thin films and SrTiO3 substrates was studied by high-pressure, in situ reflection high-energy electron diffraction and transmission electron microscopy. It is demonstrated that growth on TiO2-terminated SrTiO3 commences with the nucleation of two perovskite sub-units before the first (AO)2 double-layer forms. To obtain a sharp RP/SrTiO3 interface structure, it is necessary to buffer the TiO2-terminated SrTiO3 substrate with a sub-unit cell SrO layer before the deposition of the RP film.

KW - A1. RHEED

KW - A1. TEM

KW - A3. PLD

KW - B1. Ruddlesden-Popper

KW - B2. Magnetic materials

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