Oxygen Doping Study of Cuprate/Manganite Thin-Film Heterostructures
Abstract
Recent studies of thin-film heterostructures comprising superconducting cuprates and ferromagnetic manganites have revealed a range of novel physical phenomena [1]. These phenomena are believed to involve complex interfacial interactions between competing order parameters [2], and appear to be highly sensitive to the doping of carriers [3]. To further examine these phenomena, we carry out a systematic oxygen-doping study of YBa2Cu3O6+x/La0.67Ca0.33MnO3 multilayers, grown epitaxially by pulsed laser-ablated deposition. Our samples are characterized by electrical transport and magnetization measurements, as well as x-ray diffraction and various scanning microscopy probes. To assess the role of interfacial magnetism on the cuprate layer, YBa2Cu3O6+x /LaNiO3 samples are also made and measured as a comparison. We also examine the effects of cation substitution in the YBa2Cu3O6+x layer, in order to determine the extent of carrier doping across the interface. [1] for example, see Z. Sefrioui et al., Phys. Rev. B 67, 214511 [2] J. Hoppler et al., Nature Materials 8, 315 [3] V. Peña et al., Phys. Rev. Lett. 97, 177005
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2010
- Bibcode:
- 2010APS..MARD33007Z