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Artículo

Preparation and characterization of (CuInTe2)1-x(TaTe)x solid solutions (0<x<1)

Grima Gallardo, P.; Izarra, O.; Méndez, L.; Torres Cuenza, Sindry NatachaIcon ; Quintero, M.; Cabrera, H.; Pérez Cappé, E.; Zumeta Dubé, I.; Rodríguez, A.; Aitken, J.A.; Rai, D. P.
Fecha de publicación: 05/2018
Editorial: Elsevier Science SA
Revista: Journal of Alloys and Compounds
ISSN: 0925-8388
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Física de los Materiales Condensados

Resumen

Polycrystalline samples of the (CuInTe2)1-x(TaTe)x alloys system were prepared by the melt and anneal technique in the composition range 0 < x < 1. Products were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Differential Thermal Analysis (DTA) and SQUID techniques. From XRD and SEM, it was found that the solubility of TaTe in CuInTe2 is around 10%; however, samples up to x = 2/3 are composed by a mean tetragonal CuInTe2-like phase with traces of Ta2Te3. Samples with x > 2/3 show diffraction patterns with several phases with poor crystallization. In addition, the tetragonal CuInTe2-like phase shows spinodal decomposition i.e. there are two phases, one Ta-rich and the other Ta-poor, with the same crystal structure and very close lattice parameters. SEM measurements also show up to six different phases, although they do not produce observed diffraction line in powder XRD patterns. DC magnetic susceptibility measurements as a function of temperature using the ZFC-FC protocol were performed in samples with x ≤ 2/3. With the exception of x = 2/3, all samples show a similar behavior in the ZFC and FC curves which are typical of a system with a distribution of magnetic cluster sizes. Sample x = 2/3 shows ferromagnetic behavior with Tc = 50 K. For sample x = 1/4, measurements of the magnetization as a function of the applied magnetic field and temperature were performed. From the analysis of the curves it was found that the clusters contain 105 Ta-atoms and a coercitive field of 0.22 kOe at T = 5 K.
Palabras clave: ALLOYS , CUINTE2 , MAGNETIC SUSCEPTIBILITY , SPINODAL DECOMPOSITION , TATE
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/210509
DOI: http://dx.doi.org/10.1016/j.jallcom.2018.02.317
Colecciones
Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Citación
Grima Gallardo, P.; Izarra, O.; Méndez, L.; Torres Cuenza, Sindry Natacha; Quintero, M.; et al.; Preparation and characterization of (CuInTe2)1-x(TaTe)x solid solutions (0<x<1); Elsevier Science SA; Journal of Alloys and Compounds; 747; 5-2018; 176-188
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