Phase diagram, optical energy gap, and magnetic susceptibility of (CuGa)1−zMn2zTe2 alloys

Quintero, M.; Grima, P.; Tovar, R.; Goudreault, R.; Bissonnette, D.; Lamarche, G.; Woolley, J. C.

doi:10.1016/0022-4596(88)90209-5

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…Extrapolations to z = 0 for the x = 0 lines and to x = 0 for the z = 0 lines gives values of E, for the compounds CuInTez and AgInTe, in the zincblende form of -0.70 and -0.75 eV respectively. Previously, similar values have been obtained for other alloy systems [6,7,9,20] and corresponding values obtained for the AgGaTe2 [7], CuGaTe, [20] and CuInSez [9] compounds. These results indicate that, for this set of compounds, the difference between the measured E, for the chalcopyrite form and the extrapolated E, for the zincblende form is of the order of 0.25 eV in each case.…”

Section: Discussionsupporting

confidence: 87%

Zn_2x(CuIn)_yMn_2zTe₂and Zn_2x(AgIn)_yMn_2zTe₂alloys

Neal

Woolley

Tovar

et al. 1989

J. Phys. D: Appl. Phys.

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Polycrystalline samples of Zn2x(CuIn)yMn2zTe2 and Zn2x(AgIn)yMn2zTe2 alloys were prepared by a melt and anneal technique. X-ray power photographs were used to determine equilibrium conditions and lattice parameter values (a and c). In each system, four single-phase fields are found to exist, two with normal zincblende and chalcopyrite structures and two derived from chalcopyrite and zincblende structures in which the Mn atoms show crystallographic ordering on the cation sublattice. In the Zn2x(AgIn)yMn2zTe2 case, a two-phase (zincblende plus chalcopyrite) field was observed. Optical absorption measurements were carried out to give values of the room temperature optical energy gap E0 for all single-phase samples. While E0 varied linearly with composition inside a phase field, the resulting lines had different aiming points at z=1.0. These values of E0, which are characteristic of the structure, give a good indication of the position of the phase boundaries. Extrapolation to z=0 gave E0 values of the compounds in the zincblende structure, these being approximately 0.70 eV for CuInTe2 and approximately 0.75 eV for AgInTe2.

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Section: Discussionsupporting

confidence: 87%

Zn_2x(CuIn)_yMn_2zTe₂and Zn_2x(AgIn)_yMn_2zTe₂alloys

Neal

Woolley

Tovar

et al. 1989

J. Phys. D: Appl. Phys.

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“…(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.…”

Section: Methodsmentioning

confidence: 99%

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

Gallardo¹,

Durán²,

Quintero³

et al. 2002

phys. stat. sol. (a)

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“…In more recent years, the extension of A II 1--x Mn x B VI compounds (Diluted Magnetic Semiconductors, DMS) has been obtained from the (I-III-VI 2 ) x -(Mn-VI) 1--x alloy families [14][15][16][17]. At STP, MnS and MnSe crystallize in the cubic rocksalt structure while MnTe does it in the hexagonal NiAs-type structure.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of (Cu-III-Se2)x-(FeSe)1?x Alloys (III: Al, Ga, In) (0 ? x ? 1) by X-Ray Diffraction, Differential Thermal Analysis and Scanning Electron Microscopy

Grima‐Gallardo¹,

Cárdenas²,

Molina³

et al. 2001

phys. stat. sol. (a)

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Polycrystalline samples of (Cu-III-Se 2 )-(FeSe) 1--x alloys (III: Al, Ga and In) were prepared by the usual melting and annealing method in the entire composition range 1 x 0. X-Ray Diffraction (XRD), Differential Thermal Analysis (DTA) and Scanning Electron Microscopy (SEM) techniques were used to characterize the products. From SEM technique, the stoichiometric relation for each sample was checked to be very close to the nominal values, with deviations less than 10%. XRD measurements showed that, for the three alloy families, there is a wide single-phase field, with a chalcopyrite-like structure, for 1x 0.5. The lattice parameters vary linearly with composition and the variation can be predicted using Jaffe and Zunger's model for chalcopyrites, Pauling's set of covalent radii, and the covalent radius of 1.35 A for Fe. From DTA measurements, thermal transitions in the temperature range 300 K < T < 1400 K were obtained. The melting point decreases from that of extreme compounds (x = 0 and x = 1) towards an intersection point (local minimum) at around x = 0.3. These results suggest that under adequate thermal treatments, the single-phase field could be increasing up to around x = 0.3. In a closer analysis, a pronounced local minimum has been observed at x = 2/3 for Ga and In-based alloys, suggesting that the composition x = 2/3 is a new class of compounds, the (Cu-III) 2 FeSe 5 .

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Phase diagram, optical energy gap, and magnetic susceptibility of (CuGa)1−zMn2zTe2 alloys

Cited by 16 publications

References 12 publications

Zn_2x(CuIn)_yMn_2zTe₂and Zn_2x(AgIn)_yMn_2zTe₂alloys

Zn_2x(CuIn)_yMn_2zTe₂and Zn_2x(AgIn)_yMn_2zTe₂alloys

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

A Comparative Study of (Cu-III-Se2)x-(FeSe)1?x Alloys (III: Al, Ga, In) (0 ? x ? 1) by X-Ray Diffraction, Differential Thermal Analysis and Scanning Electron Microscopy

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Phase diagram, optical energy gap, and magnetic susceptibility of (CuGa)1−zMn2zTe2 alloys

Cited by 16 publications

References 12 publications

Zn2x(CuIn)yMn2zTe2and Zn2x(AgIn)yMn2zTe2alloys

Zn2x(CuIn)yMn2zTe2and Zn2x(AgIn)yMn2zTe2alloys

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

A Comparative Study of (Cu-III-Se2)x-(FeSe)1?x Alloys (III: Al, Ga, In) (0 ? x ? 1) by X-Ray Diffraction, Differential Thermal Analysis and Scanning Electron Microscopy

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Zn_2x(CuIn)_yMn_2zTe₂and Zn_2x(AgIn)_yMn_2zTe₂alloys

Zn_2x(CuIn)_yMn_2zTe₂and Zn_2x(AgIn)_yMn_2zTe₂alloys