Epitaxial growth of (111)-oriented BaTiO3/SrTiO3 perovskite superlattices on Pt(111)/Ti/Al2O3(0001) substrates

被引：16
|
作者：
Panomsuwan, Gasidit [1 ]
Takai, Osamu [1 ]
Saito, Nagahiro [1 ,2 ,3 ]
机构：
[1] Nagoya Univ, Grad Sch Engn, Dept Mat Phys & Energy Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[2] Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[3] Nagoya Univ, Green Mobil Collaborat Res Ctr, Chikusa Ku, Nagoya, Aichi 4648603, Japan
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 11期
关键词：
PULSED-LASER DEPOSITION; DIELECTRIC-PROPERTIES; THIN-FILMS; SRTIO3;
D O I：
10.1063/1.4820780
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Symmetric BaTiO3/SrTiO3 (BTO/STO) superlattices (SLs) were epitaxially grown on Pt(111)/Ti/Al2O3(0001) substrates with various modulation periods (Lambda = 4.8 - 48 nm) using double ion beam sputter deposition. The BTO/STO SLs exhibit high (111) orientation with two in-plane orientation variants related by a 180 degrees rotation along the [111](Pt) axis. The BTO layer is under an in-plane compressive state, whereas the STO layer is under an in-plane tensile state due to the effect of lattice mismatch. A remarkable enhancement of dielectric constant is observed for the SL with relatively small modulation period, which is attributed to both the interlayer biaxial strain effect and the Maxwell-Wagner effect. (C) 2013 AIP Publishing LLC.
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页数：4
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