Ti diffusion in (001) SrTiO3-CoFe2O4 epitaxial heterostructures: blocking role of a MgAl2O4 buffer

被引：12
作者：
Rebled, J. M. [1 ,2 ]
Foerster, M. [1 ]
Estrade, S. [2 ,3 ]
Rigato, F. [1 ]
Kanamadi, C. [1 ]
Sanchez, F. [1 ]
Peiro, F. [2 ]
Fontcuberta, J. [1 ]
机构：
[1] ICMAB CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Catalonia, Spain
[2] Univ Barcelona, Dept Elect, LENS MIND IN2UB, E-08028 Barcelona, Catalonia, Spain
[3] Univ Barcelona, CCiT, TEM MAT, E-08028 Barcelona, Catalonia, Spain
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 41期
关键词：
THIN-FILMS; MAGNETIC-BEHAVIOR; NIFE2O4; INTERDIFFUSION; ANISOTROPY; MAGNESIUM; GROWTH;
D O I：
10.1039/c3cp00001j
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Titanium diffusion from (001) SrTiO3 (STO) substrates into CoFe2O4 (CFO) films grown using pulsed laser deposition is reported. To elucidate the reasons for Ti interdiffusion, a comparative study of CFO films grown on MgAl2O4 (MAO) and STO substrates, buffered by thin STO and MAO layers, has been made. It is shown that whereas bottom STO layers always result in Ti migration, a thin MAO layer, only 8 nm thick, is effective in blocking it. We argue that this success relies on the lower mobility of Ti ions in the MAO lattice compared to that of CFO. This result should contribute to the development of high quality epitaxial heterostructures of dissimilar complex oxides.
引用
收藏
页码：18274 / 18280
页数：7
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