The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition
In this paper, Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) thin films were deposited on single crystal SrTiO3 (STO) (100) by pulsed laser deposition (PLD) technique at different pressures of oxygen. Crystal structure of bulk and thin film samples was studied by x-ray diffraction (XRD). The XRD results indicate...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2013-09-01
|
| Series: | Iranian Journal of Physics Research |
| Subjects: | |
| Online Access: | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-618&slc_lang=en&sid=1 |
| _version_ | 1828294575764013056 |
|---|---|
| author | S Daneshmandi P Sohrabi M Ranjbar H Salamati |
| author_facet | S Daneshmandi P Sohrabi M Ranjbar H Salamati |
| author_sort | S Daneshmandi |
| collection | DOAJ |
| description | In this paper, Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) thin films were deposited on single crystal SrTiO3 (STO) (100) by pulsed laser deposition (PLD) technique at different pressures of oxygen. Crystal structure of bulk and thin film samples was studied by x-ray diffraction (XRD). The XRD results indicate that both bulk and thin film samples have cubic structures. AFM micrographs showed an increase in RMS roughness by oxygen pressure. The electrical resistance was measured at room temperature up to 600 and 800 °C in air using four probe method for bulk and thin films, respectively. A sharp drop in resistance was observed by increasing temperature up to 400 °C, that was explained with the small polaron hopping model. Polaron activation energy was calculated by Arrhenius relation. It was decreased over increasing oxygen pressure. The surface exchange coefficient (Kchem) of the 300 mTorr sample was measured by electrical conductivity relaxation (ECR) technique. The results suggested a linear relationship between Kchem and reciprocal of absolute temperature. |
| first_indexed | 2024-04-13T11:39:59Z |
| format | Article |
| id | doaj.art-8c0361b9325d415c8d2c9dc00098c310 |
| institution | Directory Open Access Journal |
| issn | 1682-6957 |
| language | English |
| last_indexed | 2024-04-13T11:39:59Z |
| publishDate | 2013-09-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Iranian Journal of Physics Research |
| spelling | doaj.art-8c0361b9325d415c8d2c9dc00098c3102022-12-22T02:48:20ZengIsfahan University of TechnologyIranian Journal of Physics Research1682-69572013-09-011315763The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser depositionS DaneshmandiP SohrabiM RanjbarH SalamatiIn this paper, Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) thin films were deposited on single crystal SrTiO3 (STO) (100) by pulsed laser deposition (PLD) technique at different pressures of oxygen. Crystal structure of bulk and thin film samples was studied by x-ray diffraction (XRD). The XRD results indicate that both bulk and thin film samples have cubic structures. AFM micrographs showed an increase in RMS roughness by oxygen pressure. The electrical resistance was measured at room temperature up to 600 and 800 °C in air using four probe method for bulk and thin films, respectively. A sharp drop in resistance was observed by increasing temperature up to 400 °C, that was explained with the small polaron hopping model. Polaron activation energy was calculated by Arrhenius relation. It was decreased over increasing oxygen pressure. The surface exchange coefficient (Kchem) of the 300 mTorr sample was measured by electrical conductivity relaxation (ECR) technique. The results suggested a linear relationship between Kchem and reciprocal of absolute temperature.http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-618&slc_lang=en&sid=1solid oxide fuel cellcathodethin filmpulsed laser deposition |
| spellingShingle | S Daneshmandi P Sohrabi M Ranjbar H Salamati The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition Iranian Journal of Physics Research solid oxide fuel cell cathode thin film pulsed laser deposition |
| title | The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition |
| title_full | The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition |
| title_fullStr | The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition |
| title_full_unstemmed | The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition |
| title_short | The effect of oxygen pressure on structure, electrical conductivity and oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin films by pulsed laser deposition |
| title_sort | effect of oxygen pressure on structure electrical conductivity and oxygen permeability of ba0 5sr0 5co0 8fe0 2o3 δ thin films by pulsed laser deposition |
| topic | solid oxide fuel cell cathode thin film pulsed laser deposition |
| url | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-618&slc_lang=en&sid=1 |
| work_keys_str_mv | AT sdaneshmandi theeffectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT psohrabi theeffectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT mranjbar theeffectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT hsalamati theeffectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT sdaneshmandi effectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT psohrabi effectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT mranjbar effectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition AT hsalamati effectofoxygenpressureonstructureelectricalconductivityandoxygenpermeabilityofba05sr05co08fe02o3dthinfilmsbypulsedlaserdeposition |