Substrate dependent transport and magnetotransport in manganite multilayer
| Autor: | Nikesh A. Shah, Sudhindra Rayaprol, R.R. Doshi, P.S. Vachhani, D. G. Kuberkar, P.S. Solanki |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Condensed matter physics Magnetoresistance Electrical resistivity and conductivity Analytical chemistry Heterojunction Substrate (electronics) Electrical and Electronic Engineering Condensed Matter Physics Manganite Temperature coefficient Electronic Optical and Magnetic Materials Pulsed laser deposition |
| Zdroj: | Physica B: Condensed Matter. 406:2270-2272 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2011.03.051 |
| Popis: | We report magnetotransport properties of La 0.5 Pr 0.2 Sr 0.3 MnO 3 (LPSMO) {5 layers}/La 0.5 Pr 0.2 Ba 0.3 MnO 3 (LPBMO) {4 layers} manganite multilayers grown on single crystalline STO ( h 0 0) and NGO ( h 0 0) substrates using pulsed laser deposition (PLD) technique. An appreciable magnetoresistance (MR) ∼56% (80 kOe field) at room temperature (RT) is exhibited by the heterostructure deposited on STO substrate having field coefficient of resistance (FCR) ∼35% (100 Oe) while the multilayer deposited on NGO substrate exhibits MR∼61% (80 kOe field) and FCR∼18% (5 kOe) at RT. The observed values of temperature coefficient of resistance (TCR) are ∼3.15% and 2.77% at RT for the multilayers grown on STO and NGO substrates, respectively. A comparison of the field sensitivity of the multilayered structure studied with those reported for LPSMO/Al 2 O 3 /LPSMO (FCR∼20% at 220 K) and LPSMO/STO film (FCR∼13% at 250 K) shows that the multilayer exhibits higher field sensitivity, which can be attributed to the improved LPSMO–LPBMO interfaces. In this communication, the results of the structural, transport and magnetotransport studies on LPSMO/LPBMO multilayered systems have been discussed. |
| Databáze: | OpenAIRE |
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