Unique crystal growth with crystal axis rotation in multi-ferroic β′-(Sm,Gd)2(MoO4)3 narrow lines patterned by lasers in glass
Unique crystal growth with crystal axis rotation in multi-ferroic β′-(Sm,Gd)2(MoO4)3 narrow lines patterned by lasers in glass
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DOI：
10.1016/j.jpcs.2014.04.007
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发表时间：
2014-08
影响因子：
4
通讯作者：
Futoshi Suzuki;T. Honma;T. Komatsu
中科院分区：
文献类型：
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作者：
Futoshi Suzuki;T. Honma;T. Komatsu
利用透射电子显微镜（TEM）观察了3Sm 2 O3 -18.25Gd2O3-63.75MoO3- 15 B2 O3（mol%）玻璃中多铁性β′-（Sm，Gd）2（MoO 4）3晶体的形貌和取向。在TEM观察中，从选区电子衍射（SAED）图案确定线中晶体的结晶方向，并且证明结晶轴沿晶体生长方向（激光扫描方向）沿着逐渐旋转。这种独特的晶体生长与晶体学轴的螺旋状旋转是由于β′-（Sm，Gd）2（MoO 4）3晶体中（MoO 4）2−四面体单元的逐渐旋转。激光诱导结晶技术将晶体生长的区域和方向人为地限制在一个狭窄的空间内，为晶体生长提供了一种新的工程方法。
The morphology and orientation of multi-ferroic β′-(Sm,Gd)2(MoO4)3crystals in the lines patterned by laser irradiations in 3Sm2O3–18.25Gd2O3–63.75MoO3–15B2O3(mol%) glass were examined using transmission electron microscope (TEM) observations in order to clarify the origin of the appearance of periodic birefringence in an atomic-scale level. The crystallographic direction of crystals in the lines was determined from selected area electron diffraction (SAED) patterns in TEM observations, and it was demonstrated that a gradual rotation of crystallographic axes takes place along the crystal growth direction (laser scanning direction). The unique crystal growth with a spiral-like rotation of the crystallographic axes is due to the gradual rotation of (MoO4)2−tetrahedral units in β′-(Sm,Gd)2(MoO4)3crystals. The laser-induced crystallization, in which the region and direction of crystal growth are restricted artificially to a narrow space, provides a new crystal growth engineering.