Growth behavior of artificial hexagonal GdMnO3 thin films

The epitaxial growth of the artificial hexagonal GdMnO3 phase was investigated on substrates with hexagonal symmetries. The GdMnO3 thin films grown on Pt(111)/Al2O3(0001) substrates showed a mixed state of a dominant hexagonal phase and small additional orthorhombic phases, which were stable in bulk...

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Veröffentlicht in:	Journal of crystal growth 2008-02, Vol.310 (4), p.829-835
Hauptverfasser:	LEE, Daesu, LEE, Jung-Hyuk, SEUNG YUP JANG, MURUGAVEL, Pattukkannu, KO, Young-Dong, CHUNG, Jin-Seok
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Dielectric thin films Dielectrics, piezoelectrics, and ferroelectrics and their properties Exact sciences and technology Laser deposition Materials science Methods of deposition of films and coatings film growth and epitaxy Physics Structure and morphology thickness Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Theory and models of film growth Thin film structure and morphology
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Zusammenfassung:	The epitaxial growth of the artificial hexagonal GdMnO3 phase was investigated on substrates with hexagonal symmetries. The GdMnO3 thin films grown on Pt(111)/Al2O3(0001) substrates showed a mixed state of a dominant hexagonal phase and small additional orthorhombic phases, which were stable in bulk. In this study, high oxygen partial pressures during film deposition were found to help to fabricate GdMnO3 thin films in the dominant hexagonal phase. Also, the growth behavior of the small additional orthorhombic GdMnO3 phases was studied by X-ray diffraction (XRD) measurements with a synchrotron radiation X-ray source. This study confirmed that even the orthorhombic GdMnO3 phases prefer specific orientations on the substrates with an in-plane hexagonal symmetry.
ISSN:	0022-0248 1873-5002
DOI:	10.1016/j.jcrysgro.2007.11.101