S. Matsuo, T. Yamada, M. Yoshino, T. Nagasaki, T. Kamo, H. Funakubo
{"title":"(001)-外延(Ba, Sr) TiO3薄膜中电热效应的非线性电场依赖性","authors":"S. Matsuo, T. Yamada, M. Yoshino, T. Nagasaki, T. Kamo, H. Funakubo","doi":"10.1109/ISAF.2017.8000214","DOIUrl":null,"url":null,"abstract":"Recently, electrocaloric (EC) effect in ferroelectric thin films has been intensively studied for emerging cooling devices. The pyroelectric coefficient, which mainly determines the magnitude of the EC effect, depends not only on the temperature but also on the applied electric field. Therefore, we investigated the influence of the electric field on the EC effect in a Ba<inf>0.5</inf>Sr<inf>0.5</inf>TiO<inf>3</inf> thin film fabricated on SrRuO<inf>3</inf>/SrTiO<inf>3</inf> (001) substrate. It was found that the temperature showing the largest EC effect, T<inf>max</inf>, increased with the electric field change ΔE when ΔE was below 115 kV/cm. However, it decreased with further ΔE. The observed tendency was different from the theoretical prediction.","PeriodicalId":421889,"journal":{"name":"2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Nonlinear electric field dependence of electrocaloric effect in (001)-epitaxial (Ba, Sr) TiO3 thin films\",\"authors\":\"S. Matsuo, T. Yamada, M. Yoshino, T. Nagasaki, T. Kamo, H. Funakubo\",\"doi\":\"10.1109/ISAF.2017.8000214\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Recently, electrocaloric (EC) effect in ferroelectric thin films has been intensively studied for emerging cooling devices. The pyroelectric coefficient, which mainly determines the magnitude of the EC effect, depends not only on the temperature but also on the applied electric field. Therefore, we investigated the influence of the electric field on the EC effect in a Ba<inf>0.5</inf>Sr<inf>0.5</inf>TiO<inf>3</inf> thin film fabricated on SrRuO<inf>3</inf>/SrTiO<inf>3</inf> (001) substrate. It was found that the temperature showing the largest EC effect, T<inf>max</inf>, increased with the electric field change ΔE when ΔE was below 115 kV/cm. However, it decreased with further ΔE. The observed tendency was different from the theoretical prediction.\",\"PeriodicalId\":421889,\"journal\":{\"name\":\"2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM)\",\"volume\":\"14 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-05-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISAF.2017.8000214\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISAF.2017.8000214","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Nonlinear electric field dependence of electrocaloric effect in (001)-epitaxial (Ba, Sr) TiO3 thin films
Recently, electrocaloric (EC) effect in ferroelectric thin films has been intensively studied for emerging cooling devices. The pyroelectric coefficient, which mainly determines the magnitude of the EC effect, depends not only on the temperature but also on the applied electric field. Therefore, we investigated the influence of the electric field on the EC effect in a Ba0.5Sr0.5TiO3 thin film fabricated on SrRuO3/SrTiO3 (001) substrate. It was found that the temperature showing the largest EC effect, Tmax, increased with the electric field change ΔE when ΔE was below 115 kV/cm. However, it decreased with further ΔE. The observed tendency was different from the theoretical prediction.
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