| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Solid-state Optical Materials and Luminescence Properties
|
| Presentation Title |
Micro- and Submicro-defects in Magneto-optical Crystal CeF3 |
| Author(s) |
Dongsheng Yuan, Encarnación G. Víllora, Kiyoshi Shimamura |
| On-Site Speaker (Planned) |
Dongsheng Yuan |
| Abstract Scope |
CeF3 is a novel Faraday crystal to achieve UV-visible magneto-optical isolators, in particular for the working wavelengths below 400 nm. Although the CeF3 single crystals grown by the Bridgman technique had shown high crystalline and optical quality, however, residual scatterings are recently found inside. We have elucidated that these scattering centers are in fact microvoids with the shape of regular hexagons and sizes varying between 1 and 13 µm. Both theoretical simulation and spontaneous crystal growth indicate that these microvoids reflect exactly the natural crystal habit in “negative” form: the prisms stand along the c-axis and the hexagonal sides are parallel to the six equivalent planes perpendicular to the a-axis. The formation of the microvoids is possibly caused by the high vapor pressure of CeF3 melt at its high melting point. Meanwhile, the submicro-defects will be explored beyond the observed microvoids by using high-resolution XRD and TEM. |