Subtle interplay between localized magnetic moments and itinerant electrons in LaAlO3/SrTiO3 heterostructures

Hu, Hai-Long, Zeng, Rong, Pham, Anh, Tan, Thiam Teck, Chen, Zhigang, Kong, Charlie, Wang, Danyang and Li, Sean (2016) Subtle interplay between localized magnetic moments and itinerant electrons in LaAlO3/SrTiO3 heterostructures. ACS Applied Materials and Interfaces, 8 21: 13630-13636. doi:10.1021/acsami.6b01518


Author Hu, Hai-Long
Zeng, Rong
Pham, Anh
Tan, Thiam Teck
Chen, Zhigang
Kong, Charlie
Wang, Danyang
Li, Sean
Title Subtle interplay between localized magnetic moments and itinerant electrons in LaAlO3/SrTiO3 heterostructures
Formatted title
Subtle interplay between localized magnetic moments and itinerant electrons in LaAlO3/SrTiO3 heterostructures
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8252
1944-8244
Publication date 2016-06-01
Year available 2016
Sub-type Article (original research)
DOI 10.1021/acsami.6b01518
Open Access Status Not Open Access
Volume 8
Issue 21
Start page 13630
End page 13636
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2017
Language eng
Formatted 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
Keyword Anisotropic magnetoresistance
Itinerant electrons
LaAlO3/SrTiO3 heterostructures
Localized magnetic moments
Oxygen vacancy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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