Ferroelectric to paraelectric phase transition of BaTiO3
In this project, the transition between ferroelectric and paraelectric phases of BaTiO3 (BTO) was studied. A BTO single crystal was heated up and cooled down through the Curie temperature (Tc) in an Atomic Force Microscope equipped with a heating stage. The piezoresponse of the single crystal was al...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2011
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/43942 |
| _version_ | 1826111188759478272 |
|---|---|
| author | Chen, Gaofeng. |
| author2 | Chen Lang |
| author_facet | Chen Lang Chen, Gaofeng. |
| author_sort | Chen, Gaofeng. |
| collection | NTU |
| description | In this project, the transition between ferroelectric and paraelectric phases of BaTiO3 (BTO) was studied. A BTO single crystal was heated up and cooled down through the Curie temperature (Tc) in an Atomic Force Microscope equipped with a heating stage. The piezoresponse of the single crystal was also monitored by piezoresponse force microscopy (PFM) with images being scanned at different temperatures, ranging from room temperature to around 180℃. PFM Y image data was further analyzed using 2D autocorrelation method. Amplitude images pixel distribution at all temperatures are fit by Gaussian function. Data and analysis show that phase transition of BTO between ferroelectric and paraelectric is a gradual process. At the vicinity of Curie temperature, there are small domains presenting and enhanced piezoresponse when sample is heated, showing a peak on amplitude versus temperature plot. However, no enhanced piezoresponse were found for cooling process. |
| first_indexed | 2024-10-01T02:46:37Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/43942 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:46:37Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/439422023-03-04T15:37:02Z Ferroelectric to paraelectric phase transition of BaTiO3 Chen, Gaofeng. Chen Lang School of Materials Science and Engineering DRNTU::Engineering::Materials::Magnetic materials In this project, the transition between ferroelectric and paraelectric phases of BaTiO3 (BTO) was studied. A BTO single crystal was heated up and cooled down through the Curie temperature (Tc) in an Atomic Force Microscope equipped with a heating stage. The piezoresponse of the single crystal was also monitored by piezoresponse force microscopy (PFM) with images being scanned at different temperatures, ranging from room temperature to around 180℃. PFM Y image data was further analyzed using 2D autocorrelation method. Amplitude images pixel distribution at all temperatures are fit by Gaussian function. Data and analysis show that phase transition of BTO between ferroelectric and paraelectric is a gradual process. At the vicinity of Curie temperature, there are small domains presenting and enhanced piezoresponse when sample is heated, showing a peak on amplitude versus temperature plot. However, no enhanced piezoresponse were found for cooling process. Bachelor of Engineering (Materials Engineering) 2011-05-16T03:18:12Z 2011-05-16T03:18:12Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/43942 en Nanyang Technological University 39 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Magnetic materials Chen, Gaofeng. Ferroelectric to paraelectric phase transition of BaTiO3 |
| title | Ferroelectric to paraelectric phase transition of BaTiO3 |
| title_full | Ferroelectric to paraelectric phase transition of BaTiO3 |
| title_fullStr | Ferroelectric to paraelectric phase transition of BaTiO3 |
| title_full_unstemmed | Ferroelectric to paraelectric phase transition of BaTiO3 |
| title_short | Ferroelectric to paraelectric phase transition of BaTiO3 |
| title_sort | ferroelectric to paraelectric phase transition of batio3 |
| topic | DRNTU::Engineering::Materials::Magnetic materials |
| url | http://hdl.handle.net/10356/43942 |
| work_keys_str_mv | AT chengaofeng ferroelectrictoparaelectricphasetransitionofbatio3 |