Transport in ferromagnetic GdTiO3/SrTiO3 heterostructures
Abstract
Epitaxial GdTiO3/SrTiO3 structures with different SrTiO3 layer thicknesses are grown on (001) (LaAlO3)0.3(Sr2AlTaO6)0.7 substrate surfaces by hybrid molecular beam epitaxy. It is shown that the formation of the pyrochlore (Gd2Ti2O7) phase can be avoided if GdTiO3 is grown by shuttered growth, supplying alternating monolayer doses of Gd and of the metalorganic precursor that supplies both Ti and O. Phase-pure GdTiO3 films grown by this approach exhibit magnetic ordering with a Curie temperature of 30 K. The electrical transport characteristics can be understood as being dominated by a conductive interface layer within the SrTiO3.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 14, 2011
- Source ID
- 10.1063/1.3568894
Entities
People
- Alexander Kozhanov
- Bharat Jalan
- Jack Y. Zhang
- Pouya Moetakef
- Ram Seshadri
- S. J. Allen
- Susanne Stemmer
Organizations
- Army Research Office
- National Science Foundation
- United States Department of Energy
- University of California