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Article: Metastable resistivity of La0.8Ca0.2MnO3 manganite thin films
Title | Metastable resistivity of La0.8Ca0.2MnO3 manganite thin films |
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Authors | |
Keywords | Physics |
Issue Date | 2007 |
Publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ |
Citation | Physical Review B (Condensed Matter and Materials Physics), 2007, v. 75 n. 10, article no. 104419 How to Cite? |
Abstract | Transport properties of La0.8Ca0.2MnO3 thin films 15 and 130 nm thick have been investigated and confronted with the properties of bulk single crystals of the same composition. It has been found that low-temperature resistivity of the films is sensitive to electric current and/or field treatment and thermal history of the sample. Thin films exhibit a variety of metastable resistive states and spontaneously evolve toward high-resistivity state in which the films exhibit highly nonlinear transport behavior at low temperatures. Nonlinear V-I characteristics are well described by indirect tunneling model. The memory of the resistivity can be, at least partly, erased by a heat treatment at temperatures above the memory erasing temperature. The memory erasing temperature for thin films, T=450 K, is significantly higher than that of single crystals. The results are interpreted in the context of strain driven phase separation. Coexistence of two ferromagnetic phases with different orbital orders and different conductivities is influenced by strains due to thermal cycling and current flow. |
Persistent Identifier | http://hdl.handle.net/10722/57334 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Markovich, V | en_HK |
dc.contributor.author | Jung, G | en_HK |
dc.contributor.author | Yuzhelevskii, Y | en_HK |
dc.contributor.author | Gorodetsky, G | en_HK |
dc.contributor.author | Hu, FX | en_HK |
dc.contributor.author | Gao, J | en_HK |
dc.date.accessioned | 2010-04-12T01:33:24Z | - |
dc.date.available | 2010-04-12T01:33:24Z | - |
dc.date.issued | 2007 | en_HK |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2007, v. 75 n. 10, article no. 104419 | - |
dc.identifier.issn | 1098-0121 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/57334 | - |
dc.description.abstract | Transport properties of La0.8Ca0.2MnO3 thin films 15 and 130 nm thick have been investigated and confronted with the properties of bulk single crystals of the same composition. It has been found that low-temperature resistivity of the films is sensitive to electric current and/or field treatment and thermal history of the sample. Thin films exhibit a variety of metastable resistive states and spontaneously evolve toward high-resistivity state in which the films exhibit highly nonlinear transport behavior at low temperatures. Nonlinear V-I characteristics are well described by indirect tunneling model. The memory of the resistivity can be, at least partly, erased by a heat treatment at temperatures above the memory erasing temperature. The memory erasing temperature for thin films, T=450 K, is significantly higher than that of single crystals. The results are interpreted in the context of strain driven phase separation. Coexistence of two ferromagnetic phases with different orbital orders and different conductivities is influenced by strains due to thermal cycling and current flow. | en_HK |
dc.language | eng | en_HK |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_HK |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.rights | Copyright 2007 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevB.75.104419 | - |
dc.subject | Physics | en_HK |
dc.title | Metastable resistivity of La0.8Ca0.2MnO3 manganite thin films | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=75&issue=10&spage=104419&epage=1 &date=2007&atitle=Metastable+resistivity+of+La0.8Ca0.2MnO3+manganite+thin+films | en_HK |
dc.identifier.email | Hu, FX: fxhu2002@hku.hk | en_HK |
dc.identifier.email | Gao, J: jugao@hku.hk | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1103/PhysRevB.75.104419 | en_HK |
dc.identifier.scopus | eid_2-s2.0-33947505233 | - |
dc.identifier.hkuros | 141340 | - |
dc.identifier.volume | 75 | - |
dc.identifier.issue | 10 | - |
dc.identifier.spage | article no. 104419 | - |
dc.identifier.epage | article no. 104419 | - |
dc.identifier.isi | WOS:000245329100064 | - |
dc.identifier.issnl | 1098-0121 | - |