| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7906443 | Optical Materials | 2018 | 5 Pages |
Abstract
Yb:CaYAlO4 single crystals were grown by the floating zone method and their spectral properties were investigated. Void formation was effectively suppressed by using a feed rod of Y-rich composition with the aid of a double zone-pass technique. For the oxygen excess composition of Yb:Ca0.9925Y1.0075AlO4.00375, a void-free crystal was obtained by performing only the double zone-pass. On the other hand, for cation-deficient type of Yb:Ca0.9925Y1.005AlO4, void-free crystal could not be obtained by performing the double zone-pass. The void formation is attributable to the constitutional supercooling caused by segregation of main constituents of Y and Ca, and the congruent composition may exist in the Y-rich region with existence of interstitial excess oxide ions. The absorption cross section for Ï-polarization was slightly larger than that for Ï-polarization, which is reasonable on the basis of the crystal structure of CaYAlO4.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Moe Narita, Mikio Higuchi, Takayo Ogawa, Satoshi Wada, Akira Miura, Kiyoharu Tadanaga,