کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1690344 | 1518980 | 2013 | 5 صفحه PDF | دانلود رایگان |
Epitaxial oxide superlattices (SLs) of SrTiO3 (STO) and Nb-doped SrTiO3(STNO) were fabricated on LaAlO3 (LAO) (001) substrates by an ion beam sputter deposition (IBSD) system having double electron cyclotron resonance (ECR) ion guns. The [STOx/STNOy]10 SLs were epitaxially grown at different stacking sequences (x = 6 nm, y = 1–6 nm) and maintained the periodicity z of 10. Structural properties and surface morphology are found to be strongly dependent on the STNO sublayer thickness (y). Highly strained SLs with two-dimensional growth mode is observed at smaller STNO sublayer thickness (y = 1 nm). With increasing to a critical thickness (y = 4 nm), the SLs are freely strained and transformed to three-dimensional growth mode. The results demonstrate that the double ECR-IBSD is a versatile technique for the growth of high-quality oxide SLs.
► Epitaxial STO/STNO SLs were firstly grown by a double ECR-IBSD system.
► The high-quality SLs are formed on an atomic level with desirable thickness.
► Lattice strain and growth mode are strongly dependent to the thickness of STNO sublayer.
► Double ECR-IBSD is a versatile method for the growing of high-quality oxide SLs.
Journal: Vacuum - Volume 89, March 2013, Pages 35–39