Author:
Harutyunyan V.G.,Deghoyan N.A.,Mkrtchyan L.S.,Amiraghyan L.A.,Sargsyan N.H.,Aramyan A.R.,Muradyan A.A.,Baghramyan V.V.,Harutyunyan I.G.,Alexanyan H.A.
Abstract
Abstract
This paper presents the results of an investigation of the electrical, dielectric,
ferroelectric, and second-order nonlinear optical properties of
SrB4O7 synthesized by methods of both solid-state reaction (SSR)
and crystallization of a glass tape (GT). To obtain GTs of SrB4O7,
the melt consisting of appropriate precursors was rapidly cooled using a twin-roller. The prepared
GTs were crystallized at 730°C for different durations and analyzed by X-ray
diffraction. The formation of “extended” crystals in the central part of GTs due to the
application of the GT technology is discussed. The investigation of the current-voltage
characteristic of the sample prepared by SSR showed that its breakdown voltage is higher than 1000 V. The measurements of the dielectric parameters in the frequency range of 1 KHz–1 MHz showed that
the dielectric constant is about 7.5, and the dielectric loss varies from 0.002 to 0.0008. These
parameters are sufficiently stable in the temperature range from room temperature to
150°C. The ferroelectric properties of the GT crystallized at 730°C for 3 h were also investigated. At 20 kV/cm, a remnant polarization of 0.18 μC/cm2 was measured. Optical measurements showed that the intensity of
second-harmonic generation in the GT crystallized at 730°C for 3 h is 5.4 times
higher than that of KH2PO4 (KDP).