Contents: Laser Phys. Lett. 7/2010

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 233 KB
• Volume: 7
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.201090007

✦ Synopsis

It's known that single crystals of germanate melilites, such as Ba 2 ZnGe 2 O 7 and Sr 2 MgGe 2 O 7 , show a congruent melting behavior at about 1450 • C. Crystals of Sr 2 MgGe 2 O 7 were grown from melt of stoichiometric composition by the Czochralski technique using a seed crystal orientation (and pulling direction) along [001], a pulling velocity of 2 -3 mm/h and crystal rotation of 40 -60 rad/min. For single crystal growth of Ba2ZnGe2O7 a melt with a surplus of ≈ 4 wt.% BaO and ≈ 5 wt.% GeO 2 proved to be useful. Grown crystals are of dimensions up to 25 mm in length and 18 mm in diameter for Sr2MgGe2O7 and of up to 15 mm in length and in diameter for Ba 2 ZnGe 2 O 7 . In Cover picture an example of a grown crystal of Sr 2 MgGe 2 O 7 is presented. (Cover picture: A.