Different molecular mechanisms for the dielectric hysteresis and pyroelectricity in a poly(vinyl alcohol) with azobenzene-alkoxy side chains
- By means of pyroelectrical measurements and dielectric spectroscopy as well as structural information from differential scanning calorimetry, it is shown that, in a poly(vinyl alcohol) with azobenzene-alkoxy side chains, pyroelctricity and dielectric hysteresis which are usually related to each other have different origins. The pyroelectric effect is explained with reversible dipole-density changes upon thermal expansion, whereas the dielectric hysteresis is proposed to result from a charge-carrier polarisation.
| Author details: | Peter FrübingORCiD, Michael WegenerORCiDGND, Reimund GerhardORCiDGND, Alexandra BuchsteinerORCiD, Werner Neumann, Ludwig BrehmerGND |
|---|---|
| ISSN: | 0277-786X |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 1999 |
| Publication year: | 1999 |
| Release date: | 2017/03/24 |
| Source: | Proceedings : SPIE. - ISSN: 0277-786X. - 4017 (1999), S. 26 - 28 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |
