Electronic conduction in La-based perovskite-type oxides
A systematic study of La-based perovskite-type oxides from the viewpoint of their electronic conduction properties was performed. LaCo0.5Ni0.5O3±δ was found to be a promising candidate as a replacement for standard metals used in oxide electrodes and wiring that are operated at temperatures up to 11...
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2015-04-01
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Online Access: | http://dx.doi.org/10.1088/1468-6996/16/2/026001 |
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doaj-c6dd329827354781aa3f6893b4ff9ad12020-11-25T01:28:20ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142015-04-0116210.1088/1468-6996/16/2/02600111661273Electronic conduction in La-based perovskite-type oxidesHisashi Kozuka0Kazushige Ohbayashi1Kunihito Koumoto2NGK Spark Plug Co., LtdNGK Spark Plug Co., LtdNagoya UniversityA systematic study of La-based perovskite-type oxides from the viewpoint of their electronic conduction properties was performed. LaCo0.5Ni0.5O3±δ was found to be a promising candidate as a replacement for standard metals used in oxide electrodes and wiring that are operated at temperatures up to 1173 K in air because of its high electrical conductivity and stability at high temperatures. LaCo0.5Ni0.5O3±δ exhibits a high conductivity of 1.9 × 103 S cm−1 at room temperature (R.T.) because of a high carrier concentration n of 2.2 × 1022 cm−3 and a small effective mass m∗ of 0.10 me. Notably, LaCo0.5Ni0.5O3±δ exhibits this high electrical conductivity from R.T. to 1173 K, and little change in the oxygen content occurs under these conditions. LaCo0.5Ni0.5O3±δ is the most suitable for the fabrication of oxide electrodes and wiring, though La1−xSrxCoO3±δ and La1−xSrxMnO3±δ also exhibit high electronic conductivity at R.T., with maximum electrical conductivities of 4.4 × 103 S cm−1 for La0.5Sr0.5CoO3±δ and 1.5 × 103 S cm−1 for La0.6Sr0.4MnO3±δ because oxygen release occurs in La1−xSrxCoO3±δ as elevating temperature and the electrical conductivity of La0.6Sr0.4MnO3±δ slightly decreases at temperatures above 400 K.http://dx.doi.org/10.1088/1468-6996/16/2/026001electronic conductionelectrical conductivitycarrier concentrationcarrier mobilityeffective massrelaxation time |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hisashi Kozuka Kazushige Ohbayashi Kunihito Koumoto |
spellingShingle |
Hisashi Kozuka Kazushige Ohbayashi Kunihito Koumoto Electronic conduction in La-based perovskite-type oxides Science and Technology of Advanced Materials electronic conduction electrical conductivity carrier concentration carrier mobility effective mass relaxation time |
author_facet |
Hisashi Kozuka Kazushige Ohbayashi Kunihito Koumoto |
author_sort |
Hisashi Kozuka |
title |
Electronic conduction in La-based perovskite-type oxides |
title_short |
Electronic conduction in La-based perovskite-type oxides |
title_full |
Electronic conduction in La-based perovskite-type oxides |
title_fullStr |
Electronic conduction in La-based perovskite-type oxides |
title_full_unstemmed |
Electronic conduction in La-based perovskite-type oxides |
title_sort |
electronic conduction in la-based perovskite-type oxides |
publisher |
Taylor & Francis Group |
series |
Science and Technology of Advanced Materials |
issn |
1468-6996 1878-5514 |
publishDate |
2015-04-01 |
description |
A systematic study of La-based perovskite-type oxides from the viewpoint of their electronic conduction properties was performed. LaCo0.5Ni0.5O3±δ was found to be a promising candidate as a replacement for standard metals used in oxide electrodes and wiring that are operated at temperatures up to 1173 K in air because of its high electrical conductivity and stability at high temperatures. LaCo0.5Ni0.5O3±δ exhibits a high conductivity of 1.9 × 103 S cm−1 at room temperature (R.T.) because of a high carrier concentration n of 2.2 × 1022 cm−3 and a small effective mass m∗ of 0.10 me. Notably, LaCo0.5Ni0.5O3±δ exhibits this high electrical conductivity from R.T. to 1173 K, and little change in the oxygen content occurs under these conditions. LaCo0.5Ni0.5O3±δ is the most suitable for the fabrication of oxide electrodes and wiring, though La1−xSrxCoO3±δ and La1−xSrxMnO3±δ also exhibit high electronic conductivity at R.T., with maximum electrical conductivities of 4.4 × 103 S cm−1 for La0.5Sr0.5CoO3±δ and 1.5 × 103 S cm−1 for La0.6Sr0.4MnO3±δ because oxygen release occurs in La1−xSrxCoO3±δ as elevating temperature and the electrical conductivity of La0.6Sr0.4MnO3±δ slightly decreases at temperatures above 400 K. |
topic |
electronic conduction electrical conductivity carrier concentration carrier mobility effective mass relaxation time |
url |
http://dx.doi.org/10.1088/1468-6996/16/2/026001 |
work_keys_str_mv |
AT hisashikozuka electronicconductioninlabasedperovskitetypeoxides AT kazushigeohbayashi electronicconductioninlabasedperovskitetypeoxides AT kunihitokoumoto electronicconductioninlabasedperovskitetypeoxides |
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1725102280373436416 |