Growth Diagram and Magnetic Properties of Hexagonal LuFe2O4 Thin Films
/ Authors
Wenbin Wang, Z. Gai, M. Chi, J. Fowlkes, J. Yi, Leyi Zhu, Xuemei Cheng, D. Keavney, P. Snijders, T. Ward
and 2 more authors
/ Abstract
A growth diagram of Lu-Fe-O compounds on an MgO (111) substrate using pulsed laser deposition is constructed according to the experimental data. The LuFe2O4 phase can only be grown in a small range of temperature and O2 pressure conditions. Fundamental understanding of the growth mechanism of Lu-Fe-O compound films are gained in terms of the thermal chemistry at the surface. Superparamagnetism is observed in a film of LuFe2O4 clusters separated by the hexagonal LuFeO3 phase and structural defects.
Journal: Physical Review B