Structure and physical properties of Zn 1-x Mg x Se single crystals

Abstract

The vertical Bridgman method is used to obtain crystals of Zn1, Mg Se solid solutions (0.03 x 0.55). The composition of the samples is determined by means of electron-probe microanalysis. The methods of optical microscopy and X-ray analysis are used to investigate the structure of the crystal and to determine their lattice perameters. Investigated are the microhardness and microbrittleness of the grown crystals, as well as their polarizational, optical, photoelectric and dielectric properties depending on Mg concentration. The obtained crystals are found to possess anisotropy of physical properties. The largest anisotropy of their mechanical, polarizational and optical properties is observed in the crystals containing 5-6 at.% of Mg. The samples with such a concentration of Mg are applicable as a base for making thermostable multifunctional IR optical elements which can operate within a wide spectral region.

Spectroscopic and laser properties of Cr2+ ions in Zn1−xMgxSe solid solutions

“…As it follows from the literature data [23] the ZnSe crystal has a Zinc blende (cubic) structure with the lattice parameter a = 5.6687 Å. Each Zn ion is tetrahedrally coordinated by four Se ions.…”

“…Changes of the triangle pyramid parameters d (side of the base) and h (height of the pyramid) [Å] in an undoped unit cell of Zn 1Àx Mg x Se crystal for different Mg content (x)[23].…”