Phase diagram, optical energy gap, and magnetic susceptibility of (CuIn)1−zMn2zSe2 alloys

Abstract

Polycrystalline samples of (CuIn)1−zMn2zSe2 alloys are prepared by the melt and anneal technique and are used in differential thermal analysis, lattice parameter, optical energy gap, and magnetic susceptibility measurements. It is found that the range of single phase solid solution in CuInSe2 extends to z = 0.32 and that the transition temperature from chalcopyrite to zinc blende decreases from 810 °C at z = 0 to 510 °C at the limit of single phase behaviour. Measurements of optical energy gap and magnetic susceptibility as a function of temperature show that in all of the chalcopyrite samples ordering of the manganese on the cation sublattice occurs, while for the zincblende samples, the manganese may be ordered or disordered depending upon the heat treatment used. The magnetic data indicates that the ordering is the same as that observed previously in similar telluride alloys.

Magnetic properties of Cu2Cd1−zMnzGeSe4 and Cu2Cd1−zFezGeSe4 alloys

“…This result is expected since the number of magnetic ions decreases as z is decreased. As has been seen for other similar materials [14,15], extrapolation of T N to zero gives a value for the nearest neighbor percolation limit. Extrapolation of the lines in Fig.…”

X-Ray Diffraction (XRD), Differential Thermal Analysis (DTA), and Scanning Electron Microscopy (SEM) of (CuInSe2)1?x (VSe)x Alloys (0 ?x ? 0.5)

“…(CuGaTe)(CdTe) [1,6,28,45]; (AgInTe 2 )(ZnTe) [18,28] [24,26,43]; (AgInTe 2 )(MnTe) [14,26,42] (CuGaTe 2 )(MnTe) [16] cubic (NaCl) relative short range of solid solubility (CuInSe 2 )(MnSe) [15]; (CuGaSe 2 )(MnSe) [44]; (CuInS 2 )(MnS) [50] hexagonal (W) short range of solid solubility exceptions: relative large single phase field (CuAlS 2 )(CdS), (CuGaS 2 )(CdS), (CuAlS 2 )(CdS), (AgAlS 2 )(CdS), (AgInS 2 )(CdS), (AgAlS 2 )(ZnS), (CuInS 2 )(CdS), (AgGaS 2 )(CdS) [4,28]; (CuGaSe 2 )(CdSe) [25,28]; (AgGaS 2 )(ZnS) [2,28] ; (AgInS 2 )(ZnS) [2,3,28] (CuInSe 2 )(CdSe) [12,28] usually gives samples showing conditions corresponding to equilibrium near room temperature.…”

Preparation and characterization of (CuInSe2)1−x(CoSe)x alloys in the composition range 0 ≤ x ≤ 2/3

“…The atoms Fe (Z = 26) and Co (Z = 27) are very similar, in consequence, it is to be expected that (CuInSe 2 -CoSe) alloys will have a similar behavior to (CuInSe 2 -FeSe) alloys, recently studied [8]. (CuInSe 2 ) 1-x (2ZnSe) x 0 < x < 0.60 [2] 0 < x < 0.43 [3] two phases (α + β) for 0.6 < x < 0.7 and single phase (β) for 0.7 < x < 1 very narrow two-phase field and single phase (β) for 0.48 < x < 1 (CuInSe 2 ) 1-x (2CdSe) x 0 < x < 0.05 [4] two phases (α + β) for 0.05 < x < 0.3 single phase (β) for 0.3 < x < 0.7 and single phase (γ) for 0.7 < x < 1 (CuInSe 2 ) 1-x (HgSe) x 0 < x < 0.09 [6] 0 < x < 0.30 [7] two phases (α + β) for 0.09 < x < 0.48 single phase (β) for 0.48 < x < 1 single phase (β) for 0.3 < x < 1 (CuInSe 2 ) 1-x (2InAs) x 0 < x < 0.15 [5] two phases (α + β) for 0.15 < x < 0.2 single phase (β) for 0.2 < x < 1 (CuInSe 2 ) 1-x (FeSe) x 0 < x < 0.7 [8] two phases for 0.7 < x < 1 (CuInSe 2 ) 1-x (MnSe) x 0 < x < 0.30 [9] two phases for 0.3 < x < 1 (CuInSe 2 ) 1-x (VSe) x 0 < x < 0.50 [10] traces of secondary phases at x > 0.2 α (tetragonal chalcopyrite), β (cubic zincblende), γ (hexagonal wurtzite)…”