Growth diagram and magnetic properties of hexagonal LuFe2O4 thin films
Abstract
A growth diagram of Lu-Fe-O compounds on MgO (111) substrates using pulsed laser deposition is constructed based on extensive growth experiments. The LuFe2O4 phase can only be grown in a small range of temperature and O2 pressure conditions. An understanding of the growth mechanism of Lu-Fe-O compound films is offered in terms of the thermochemistry at the surface. Superparamagnetism is observed in LuFe2O4 film and is explained in terms of the effect of the impurity h-LuFeO3 phase and structural defects .
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