Re-crystallization of MNA under a strong dc electric field

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• 作者：Nogueira ; Elisabete Maria da Silva Marques ; de Matos Gomes ; Etelvina ; Belsley ; Michael Scott ; et. al.
• 关键词：Organic compounds ; Crystal growth ; Nonlinear optical materials
• 刊名：Solid State Sciences
• 出版年：2001
• 出版时间：August - September, 2001
• 年：2001
• 卷：3
• 期：6
• 页码：733-740
• 全文大小：133 K

文摘

Crystals of 2-methyl-4-nitroaniline were grown from solution while subjected to a dc electric field of 9.8×10⁴ Vm⁻¹. This resulted in an alteration of the unit cell lattice parameters while the space group was modified from Cc to one of its subgroups Pc. The modified crystals display an increased second harmonic generation efficiency accompanied by a decrease in the dielectric permittivity as well as changes in the internal and external vibrational modes.