TY - JOUR
T1 - Formation mechanism of twin boundaries in lithium tetraborate
AU - Maeda, K.
AU - Fujiwara, K.
AU - Nozawa, J.
AU - Koizumi, H.
AU - Uda, S.
N1 - Funding Information:
This work was supported by the Global COE Program “Materials Integration (International Center of Education and Research), Tohoku University,” MEXT, Japan . A part of raw materials and seed crystals are provided by Mitsubishi Materials Corporation.
PY - 2011/9/15
Y1 - 2011/9/15
N2 - We investigated the relationship between crystal growth direction and twin boundary orientation in lithium tetraborate. We found that there are two twin boundary orientations, {1 0 0} and {1 1 2}, and that the twin boundary orientation depends on the growth interface orientation. Using the micro-pulling-down method, the tilting angle of a seed crystal containing a (0 1 0) twin boundary has a critical effect on controlling the twin boundary orientation. Only a (0 1 0) twin boundary forms in a growing crystal for tilting angles between 0° and 45°, whereas both (0 1 0) and (1 0 0) twin boundaries form when the tilting angle is 45°. Employing a periodic twin structure in a borate crystal may be useful for fabricating quasi-phase-matching structures since the twin boundary orientation could be controlled by selecting an appropriate growth direction.
AB - We investigated the relationship between crystal growth direction and twin boundary orientation in lithium tetraborate. We found that there are two twin boundary orientations, {1 0 0} and {1 1 2}, and that the twin boundary orientation depends on the growth interface orientation. Using the micro-pulling-down method, the tilting angle of a seed crystal containing a (0 1 0) twin boundary has a critical effect on controlling the twin boundary orientation. Only a (0 1 0) twin boundary forms in a growing crystal for tilting angles between 0° and 45°, whereas both (0 1 0) and (1 0 0) twin boundaries form when the tilting angle is 45°. Employing a periodic twin structure in a borate crystal may be useful for fabricating quasi-phase-matching structures since the twin boundary orientation could be controlled by selecting an appropriate growth direction.
KW - A1. Growth models
KW - A2. Growth from melt
KW - B1. Borates
KW - B2. Nonlinear optic materials
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U2 - 10.1016/j.jcrysgro.2011.07.018
DO - 10.1016/j.jcrysgro.2011.07.018
M3 - Article
AN - SCOPUS:80051885129
SN - 0022-0248
VL - 331
SP - 78
EP - 82
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 1
ER -