期刊
MATERIALS HORIZONS
卷 5, 期 3, 页码 536-544出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8mh00216a
关键词
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资金
- U.S. National Science Foundation (Ceramic Program) [DMR-1565822, DMR-1643911]
- U.S. Office of Naval Research [N00014-16-1-2465]
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- EPSRC [EP/L011700/1, EP/N004272/1]
- EPSRC [EP/H047867/1, EP/L011700/1, EP/N004272/1] Funding Source: UKRI
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1565822] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1643911] Funding Source: National Science Foundation
Three-dimensional (3D) frameworks have been successfully constructed by interlayering La0.7Sr0.3MnO3 (LSMO)-CeO2 based epitaxial vertically aligned nanocomposite (VAN) thin films with pure CeO2 (or LSMO) layers. Such 3D interconnected CeO2 scaffolds integrate the lateral film strain by the interlayers with the vertical strain in VAN layers, and thus achieve the maximized strain tuning in LSMO. More importantly, by varying the types of the interlayers (i.e., CeO2 or LSMO) and the number of interlayers from 1 to 3 layers, such 3D framework nanostructures effectively tune the electrical transport properties of LSMO, e.g., from a 3D insulating CeO2 framework with integrated magnetic tunnel junction structures, to a 3D conducting LSMO framework, where the magnetoresistance (MR) peak values have been tuned systematically to a record high of 66% at 56 K and enhanced MR properties at high temperatures above room temperature (approximate to 325 K). This new 3D framed design provides a novel approach in maximizing film strain, enhancing strain-driven functionalities, and manipulating the electrical transport properties effectively.
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