Nonlinear-optic and ferroelectric behavior of lithium borate-strontium bismuth tantalate glass-ceramic composite

Citation
Gs. Murugan et al., Nonlinear-optic and ferroelectric behavior of lithium borate-strontium bismuth tantalate glass-ceramic composite, APPL PHYS L, 78(25), 2001, pp. 4019-4021
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
78
Issue
25
Year of publication
2001
Pages
4019 - 4021
Database
ISI
SICI code
0003-6951(20010618)78:25<4019:NAFBOL>2.0.ZU;2-1
Abstract
Transparent glasses in the system (100-x) Li2B4O7-xSrBi(2)Ta(2)O(9) (0 less than or equal tox less than or equal to 20) were fabricated via a splat-qu enching technique. The glassy nature of the as-quenched samples was establi shed by differential thermal analyses. X-ray powder diffraction and transmi ssion electron microscopic studies confirmed the amorphous nature of the as -quenched and crystallinity (40 nm) in the heat-treated (glass-ceramic) sam ples. The dielectric constant (epsilon (r)) of the glass-ceramic composite (x=20, heat treated at 773 K/8 h) was in between that of the parent host gl ass (Li2B4O7) and strontium bismuth tantalate ceramics in the frequency ran ge 100 Hz-40 MHz at 300 K. These exhibited intense second-harmonic generati on and a ferroelectric hysteritic behavior (P vs E loops) at 300 K. The coe rcive field (E-c) and the remnant polarization (P-r) were 1053 V/cm and 0.4 83 muC/cm(2), respectively. (C) 2001 American Institute of Physics.