Subtle interplay between localized magnetic moments and itinerant electrons in LaAlO3/SrTiO3 heterostructures
Article
Article Title | Subtle interplay between localized magnetic moments and itinerant electrons in LaAlO3/SrTiO3 heterostructures |
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ERA Journal ID | 40638 |
Article Category | Article |
Authors | Hu, Hai-Long (Author), Zeng, Rong (Author), Pham, Anh (Author), Tan, Thiam Teck (Author), Chen, Zhigang (Author), Kong, Charlie (Author), Wang, Danyang (Author) and Li, Sean (Author) |
Journal Title | ACS Applied Materials and Interfaces |
Journal Citation | 8 (21), pp. 13630-13636 |
Number of Pages | 7 |
Year | 2016 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsami.6b01518 |
Web Address (URL) | http://pubs.acs.org/doi/pdf/10.1021/acsami.6b01518 |
Abstract | Clarification of the role of magnetic ordering and scattering in two-dimensional electron gas has become increasingly important to understand the transport and magnetic behavior in the LaAlO3 (LAO)/SrTiO3 (STO) heterostructures. In this work, we report the sheet resistance of the LAO/STO heterostructures as functions of temperature, magnetic field, and field orientation. An unexpected resistance minimum was discovered at 10 K under a sufficiently high in-plane magnetic field. An anisotropic magnetoresistance (MR) is clearly identified, indicating the presence of magnetic scattering which may be related to the interaction between itinerant electrons and localized magnetic moments in the LaAlO3/SrTiO3 heterostructures. It is believed that the high concentration of oxygen vacancies induced by the ultralow oxygen partial pressure during the deposition process plays a predominant role in the occurrence of the anisotropic MR. |
Keywords | anisotropic magnetoresistance; itinerant electrons; LaAlO3/SrTiO3 heterostructures; localized magnetic moments; oxygen vacancy; deposition process; field orientation; in-plane magnetic fields; itinerant electrons; localized magnetic moments; magnetic behavior; magnetic scattering; oxygen partial pressure; rare earth metals; magnetism, basic concepts and phenomena; chemical products generally; physical properties of gases, liquids and solids; crystalline solids |
ANZSRC Field of Research 2020 | 340399. Macromolecular and materials chemistry not elsewhere classified |
340699. Physical chemistry not elsewhere classified | |
400499. Chemical engineering not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of New South Wales |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q414q/subtle-interplay-between-localized-magnetic-moments-and-itinerant-electrons-in-laalo3-srtio3-heterostructures
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