Фазовые равновесия в системе ZnGeAs₂–CdGeAs₂

Splitting of the Chalcopyrite Polyhedron in an Isothermal Zn–Cd–Ge–As Tetrahedron

“…Studies concerned with the Zn-Cd-Ge-As system focused primarily on the (Zn,Cd)GeAs 2 chalcopyrite solid solution series. ZnGeAs 2 -and CdGeAs 2 -based limited solid solution series were until recently reported [2,3,6,7]. As shown by Kilanski et al in a detailed recent study [1], the solid solution in question exists as a twophase composite throughout the composition range 0 < Zn/Cd < 1 and the unit-cell parameters of both phases increase steadily with increasing Cd content [1].…”

“…The Zn/Cd ratio in (Zn,Cd)GeAs 2 chalcopyrite semiconductors determines their structural and electrical properties [1]. Even though isomorphous, ZnGeAs 2 and CdGeAs 2 form a limited solid solution series [2,3]. They sublime incongruently [4,5], and their molten mixtures tend to form glass on cooling [6,7].…”

“…They sublime incongruently [4,5], and their molten mixtures tend to form glass on cooling [6,7]. In addition to the ZnGeAs 2 -and CdGeAs 2 -based limited solid solution series [2,3], the Zn-Cd-Ge-As system contains ZnAs 2 -and CdAs 2 -based limited solid solution series [8]. An α''-(Zn,Cd) 3 As 2 continuous solid solution with a tetragonal structure undergoes polymorphic transformations: above 600°C, it transforms into β-(Zn,Cd) 3 As 2 , a cubic phase, and below 470°C it decomposes to give a number of limited solid solutions (α, α', and α'') [9,10].…”

“…Data on phase equilibria in the Zn-Cd-Ge-As system are limited to the p-T-x (pressure-temperature-composition) diagrams of the constituent binaries, the p-T-x-y diagram of the Cd-Ge-As system (where y is a second composition coordinate) [4,5,11], and pseudobinary or polythermal T-x diagrams of the ZnGeAs 2 -CdGeAs 2 [2,3], ZnAs 2 -CdAs 2 [8], Zn 3 As 2 -Cd 3 As 2 [9], ZnAs 2 -Ge [12], Zn 3 As 2 -CdAs 2 , and ZnAs 2 -Cd 3 As 2 [13] systems.…”

Transport properties of p-Zn0.9Cd0.1GeAs2 doped with manganese at high pressure

“…Разбавленные магнитные полупроводники на основе твердых растворов ZnGeAs 2 и CdGeAs 2 с примесями d-элементов перспективны в качестве новых материалов спинтроники [1,2]. В настоящей работе исследовано соединение p-Zn 0.9 Cd 0.1 GeAs 2 , легированного марганцем.…”