Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes
Creators
- 1. Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States)
- 2. Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- 3. Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom)
Description
A unique quasi-one-dimensionally channeled nanomaze structure has been self-assembled in the (La0.7Sr0.3MnO3)1−x:(ZnO)x vertically aligned nanocomposites (VANs). Significantly enhanced magnetotransport properties have been achieved by tuning the ZnO composition x. The heteroepitaxial VAN thin films, free of large angle grain boundaries, exhibit a maximum low-field magnetoresistance (LFMR) of 75% (20 K and 1 T). The enhanced LFMR close to the percolation threshold is attributed to the spin-polarized tunneling through the ferromagnetic/insulating/ferromagnetic vertical sandwiches in the nanomazes. This study suggests that the phase boundary in the nanomaze structure is an alternative approach to produce decoupled ferromagnetic domains and thus to achieve enhanced magnetoresistance
Additional details
Identifiers
- DOI
- 10.1063/1.4794899;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 102
- Journal Issue
- 9
- Journal Page Range
- p. 093114-093114.4
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 45074689
- Subject category
- S77: NANOSCIENCE AND NANOTECHNOLOGY;
- Descriptors DEI
- COMPOSITE MATERIALS; GRAIN BOUNDARIES; MAGNETORESISTANCE; NANOSTRUCTURES; SPIN ORIENTATION; THIN FILMS; TUNNEL EFFECT; ZINC OXIDES
- Descriptors DEC
- CHALCOGENIDES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; FILMS; MATERIALS; MICROSTRUCTURE; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; ZINC COMPOUNDS
Optional Information
- Notes
- (c) 2013 American Institute of Physics