Julie E. Avon

University of Ottawa

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

physica status solidi (a) (1988)

M. Quintero P. Grima Julie E. Avon G. Lamarche J. C. Woolley

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. Polykristalline (CuIn)1−zMn2zSe2-Legierungsproben werden in der Schmelze und mittels Temperung hergestellt und in der differentiellen Thermoanalyse sowie bei Messungen der optischen Bandlücke, Gitterparameter und der magnetischen Suszeptibilität benutzt. Es wird gefunden, daß sich der Bereich der Einphasen-Festkörperlösung in CuInS2 bis zu z = 0,32 ausdehnt und daß die Übergangstemperatur von Chalkopyrit zu Zinkblende von 810 °C bei z = 0 auf 510 °C an der Grenze des Einphasenverhaltens abnimmt. Meassungen der optischen Bandlücke und der magnetischen Suszeptibilität also Funktion der Temperatur zeigen, daß in allen Chalkopyritproben Ordnungsprozesse von Mangan im Kationensubgitter auftreten, während für Zinkblendeproben, Mangan geordnet oder fehlgeordnet sein kann, in Abhägigkeit von der benutzten Wärmebehandlung. Die magnetischen Werte zeigen, daß der Ordnungsvorgang der gleiche ist, der kürzlich in ähnlichen Telluridlegierungen beobachtet wurde.

Telluride

Atmospheric temperature range

10.1002/pssa.2211080214

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Citations (21)

Lattice parameter and optical-energy gap values for (Cu1−x Ag x ) (Ga1−y In y ) (Se1−z Te z )2 Alloys

Il Nuovo Cimento D (1983)

Julie E. Avon Kajornyod Yoodee J. C. Woolley

Lattice (music)

Lattice constant

Debye model

10.1007/bf02457877

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Citations (9)

Lattice parameter and optical-energy gap values for Cd x Zn y Mn z Te alloys

Il Nuovo Cimento D (1983)

R. Brun del Re T. Donofrio Julie E. Avon Jafari Majid J. C. Woolley

Debye model

Debye

Lattice constant

Lattice (music)

Atmospheric temperature range

10.1007/bf02457886

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Citations (43)

Phase Diagram, Optical Energy Gap, and Magnetic Susceptibility of (CuIn)i„«Mn2iSe2 Alloys

De Gruyter eBooks (1988)

M. Quintero P. Grima Julie E. Avon G. Lamarche J. C. Woolley

10.1515/9783112492963-013

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Citations (0)

Solid solution, lattice parameter values, and effects of electronegativity in the (Cu1−xAgx)(Ga1−yIny)(Se1−z Tez)2 alloys

Journal of Applied Physics (1984)

Julie E. Avon Kajornyod Yoodee John C. Woolley

Equilibrium conditions for the alloy system (Cu1−xAgx)(Ga1−yIny) (Se1−zTez)2 were determined throughout the complete range of composition. Polycrystalline samples of 125 different compositions, i.e., with x, y, and z=0, 0.25, 0.5, 0.75, and 1.0, were prepared by a melt and anneal technique. Different annealing temperatures in the range 600–800 °C were used depending upon the alloy composition and annealing times of up to 5 months used to attain equilibrium conditions. Debye-Scherrer x-ray powder photographs were used to investigate the equilibrium conditions. It was found that single phase chalcopyrite structure was obtained for all compositions of the copper (x=0), indium ( y=1), and tellurium (z=1) sections but that miscibility gaps occurred in the silver (x=1), gallium ( y=0), and selenium (z=0) sections, and that these miscibility gaps extended through the general alloy system. Values of lattice parameters a and c were determined for all samples showing single phase condition and for each of the above sections the variations of a and c with composition were fitted to power series in the appropriate composition coordinates. Hence contours of constant a and constant c were determined. From the parameters for each section, general series expressions in x, y, and z were developed and the values from these compared with the experimental data for the general alloys. It is shown that a modified Weaire and Noolandi relation of the form [2−(c/a)] =K(XI−XIII+qXVI)2 fits all of the experimental data. Averaged values of K and q were obtained by fitting separately to different sections of the alloy system and also to all alloys of the complete system.

Lattice constant

Electronegativity

Spinodal decomposition

Miscibility

Debye model

10.1063/1.333058

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Citations (49)

Comparison of predictions of interpolation equations with experimental values of lattice parameter and energy gap for some multicomponent alloys

Journal of Applied Physics (1984)

Julie E. Avon T. Donofrio John C. Woolley

The interpolation equations which may be used to predict properties of two composition variable semiconductor alloys such as (A1−xBx)(C1−yDy) and (AxByC1−x−y)D are reviewed and the former developed to cover the case of three variable alloys of the form (A1−xBx)(C1−yDy) (E1−zFz). The predictions of these various equations are then compared with experimental values of lattice parameters and energy gaps in the alloy systems (Cu1−xAg)(Ga1−yIny)(Se1−zTez)2 and (CdxZnyMn1−x−y)Te. The fit and appropriateness of each equation is discussed.

Interpolation

Lattice (music)

Lattice constant

10.1063/1.333322

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Citations (3)

Crystallography and optical properties of the (Cu 1-x Agx) (Ga1-y Iny) (Se1-z Tez)2 alloys.

Julie E. Avon

10.20381/ruor-18840

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Citations (0)

Lattice constant values in the (Cu1−xAgx)(In1−yGay)Te2 alloys

Journal of Applied Physics (1981)

Julie E. Avon John C. Woolley Ampai Asbjornsen Somphong Chatraphorn Kiranant Ratanathammapan

It has been shown that single phase solid solution occurs throughout the composition range of the system (Cu1−xAgx)(In1−yGay)Te2, the structure throughout being tetragonal chalcopyrite. Values of lattice parameters a and c have been determined as functions of x and y and fitted to power series expressions. Contours of constant a and constant c are plotted, and it is indicated that these parameter values can be used to determine the composition of samples in this alloy system.

Tetragonal crystal system

Lattice constant

Constant (computer programming)

Lattice (music)

10.1063/1.328589

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Citations (10)