Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology
Electric current induced Joule heating effects have been investigated in La0.8Ba0.2MnO3 ultrathin films deposited on a LaAlO3(001) single crystal substrate with a smaller lattice constant by using the sol–gel method. By applying moderate bias currents (∼10 mA), it is found that Joule self-heating si...
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| Format: | Article |
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AIP Publishing LLC
2020-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0009801 |
| _version_ | 1818260388914921472 |
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| author | Guankai Lin Haoru Wang Xuhui Cai Wei Tong Hong Zhu |
| author_facet | Guankai Lin Haoru Wang Xuhui Cai Wei Tong Hong Zhu |
| author_sort | Guankai Lin |
| collection | DOAJ |
| description | Electric current induced Joule heating effects have been investigated in La0.8Ba0.2MnO3 ultrathin films deposited on a LaAlO3(001) single crystal substrate with a smaller lattice constant by using the sol–gel method. By applying moderate bias currents (∼10 mA), it is found that Joule self-heating simply gives rise to a temperature deviation between the thermostat and the test sample, but the intrinsic ρ(T) relationship measured at a low current (0.1 mA) changes a little. However, it is noteworthy that the low-temperature transport behavior degrades from the metallic to the insulating state after applying higher bias currents (>31 mA) in vacuum. Furthermore, the metallic transport can be recovered by placing the degraded film in air. The results clearly suggest that the oxygen vacancy in the La0.8Ba0.2MnO3 films is controllable in different atmospheres, particularly with the aid of the Joule self-heating. According to the SEM images, we attribute the controlled oxygen vacancy to the nano-sized labyrinth pattern of the films, where the large surface-to-volume ratio plays a crucial role. |
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| id | doaj.art-95dc2cbae8f24636b659619255aeabee |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-12T18:30:33Z |
| publishDate | 2020-05-01 |
| publisher | AIP Publishing LLC |
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| spelling | doaj.art-95dc2cbae8f24636b659619255aeabee2022-12-22T00:15:56ZengAIP Publishing LLCAIP Advances2158-32262020-05-01105055206055206-710.1063/5.0009801Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphologyGuankai Lin0Haoru Wang1Xuhui Cai2Wei Tong3Hong Zhu4Department of Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of ChinaDepartment of Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of ChinaDepartment of Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of ChinaAnhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences, Hefei 230031, ChinaDepartment of Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of ChinaElectric current induced Joule heating effects have been investigated in La0.8Ba0.2MnO3 ultrathin films deposited on a LaAlO3(001) single crystal substrate with a smaller lattice constant by using the sol–gel method. By applying moderate bias currents (∼10 mA), it is found that Joule self-heating simply gives rise to a temperature deviation between the thermostat and the test sample, but the intrinsic ρ(T) relationship measured at a low current (0.1 mA) changes a little. However, it is noteworthy that the low-temperature transport behavior degrades from the metallic to the insulating state after applying higher bias currents (>31 mA) in vacuum. Furthermore, the metallic transport can be recovered by placing the degraded film in air. The results clearly suggest that the oxygen vacancy in the La0.8Ba0.2MnO3 films is controllable in different atmospheres, particularly with the aid of the Joule self-heating. According to the SEM images, we attribute the controlled oxygen vacancy to the nano-sized labyrinth pattern of the films, where the large surface-to-volume ratio plays a crucial role.http://dx.doi.org/10.1063/5.0009801 |
| spellingShingle | Guankai Lin Haoru Wang Xuhui Cai Wei Tong Hong Zhu Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology AIP Advances |
| title | Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology |
| title_full | Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology |
| title_fullStr | Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology |
| title_full_unstemmed | Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology |
| title_short | Joule self-heating effects and controlling oxygen vacancy in La0.8Ba0.2MnO3 ultrathin films with nano-sized labyrinth morphology |
| title_sort | joule self heating effects and controlling oxygen vacancy in la0 8ba0 2mno3 ultrathin films with nano sized labyrinth morphology |
| url | http://dx.doi.org/10.1063/5.0009801 |
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