Anisotropic magnetoresistance and spin polarization of La0.7Sr0.3MnO3/SrTiO3 superlattices
Creators
- 1. Department of Electrical Engineering, Da-Yeh University, Chang-Hwa 515, Taiwan (China)
Description
The crystalline structure, anisotropic magnetoresistance (AMR), and magnetization of La0.7Sr0.3MnO3/SrTiO3 (LSMO/STO) superlattices grown by a rf sputtering system are systematically analyzed to study the spin polarization of manganite at interfaces. The presence of positive low-temperature AMR in LSMO/STO superlattices implies that two bands of majority and minority character contribute to the transport properties, leading to a reduced spin polarization. Furthermore, the magnetization of superlattices follows the T3/2 law and decays more quickly as the thickness ratio dSTO/dLSMO increases, corresponding to a reduced exchange coupling. The results clearly show that the spin polarization is strongly correlated with the influence of interface-induced strain on the structure
Additional details
Identifiers
- DOI
- 10.1063/1.2112167;
- arXiv
- arXiv:cond-mat/0505690v1;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 87
- Journal Issue
- 17
- Journal Page Range
- p. 172503-172503.3
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37021598
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANISOTROPY; CRYSTAL STRUCTURE; DEPOSITION; EXCHANGE INTERACTIONS; INTERFACES; LANTHANUM COMPOUNDS; MAGNETIZATION; MAGNETORESISTANCE; MANGANESE OXIDES; SPIN; SPIN ORIENTATION; SPUTTERING; STRAINS; STRONTIUM TITANATES; SUPERLATTICES; THICKNESS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; CHALCOGENIDES; DIMENSIONS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INTERACTIONS; MANGANESE COMPOUNDS; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2005 American Institute of Physics