High-quality lattice-matched LaNiO3/LaMnO3 superlattices with monolayer terrace structure have
been grown on both (111)- and (001)-oriented SrTiO3 substrates by pulsed laser deposition. In contrast
to the previously reported experiments, a magnetic exchange bias is observed that reproducibly
occurs in both (111)- and (001)-oriented superlattices with the thin single layers of 5 and 7 unit cells,
respectively. The exchange bias is theoretically explained by charge transfer-induced magnetic
moments at Ni atoms. Furthermore, magnetization data at low temperature suggest two magnetic
phases in the superlattices, with Néel temperature around 10 K. Electrical transport measurements
reveal a metal-insulator transition with strong localization of electrons in the superlattices with the
thin LaNiO3 layers of 4 unit cells, in which the electrical transport is dominated by two-dimensional
variable range hopping.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:23554 |
| Date | 07 August 2018 |
| Creators | Wei, Haoming, Barzola-Quiquia, Jose Luis, Yang, Chang, Patzig, Christian, Höche, Thomas, Esquinazi, Pablo, Grundmann, Marius, Lorenz, Michael |
| Publisher | American Institute of Physics, Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 0003-6951, 1077-3118, 102403 |
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