TY - JOUR
T1 - Interface growth of La1.2Sr1.8Mn1.7Ru0.3O7 Ruddlesden-Popper films on SrTiO3
AU - Matvejeff, M.
AU - Chikyow, T.
AU - Lippmaa, M.
N1 - Funding Information:
This work has been supported by the Academy of Finland and a Grant-in-Aid for Scientific Research (B) No. 19340094 from the Japan Society for the Promotion of Science, and NEDO project 07E51002a.
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
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
UR - http://www.scopus.com/inward/record.url?scp=60649090783&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=60649090783&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2008.11.057
DO - 10.1016/j.jcrysgro.2008.11.057
M3 - Article
AN - SCOPUS:60649090783
VL - 311
SP - 1201
EP - 1205
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 4
ER -