X-ray Diffraction Study of Cd0.8Zn0.2Te Under High Pressure and Temperature

Authors: Martínez-García D.¹; Ferrer-Roca C.H.¹; Le Godec Y.²; Munsch P.³; Itié J.P.³; Muñoz-Sanjosé V.¹

Source: International Journal of High Pressure Research, Volume 22, Number 2, 1 January 2002 , pp. 403-406(4)

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Abstract:

Energy dispersive X-ray diffraction using synchrotron radiation has been used to study phase transformations of Cd_0.8Zn_0.2Te under high pressure and temperature. We confirm the presence of a cinnabar phase between the zinc-blende and rock-salt phases. But contrary to the results in CdTe, this intermediate phase is found to be stable only on pressure decrease and in a narrower pressure and temperature range. Single-phase cinnabar patterns are obtained only at 300 and 373 K. At 673 K and above, even on pressure decrease, no evidence of the cinnabar phase is found. In this temperature range, a phase segregation phenomenon is observed in the zinc-blende phase during the zinc-blende transition in both upstroke and downstroke, and the retrieved sample at ambient conditions presents a double pattern corresponding to two different Zn contents.

Keywords: Cd1-xZnxTe; High-pressure; High-temperature; X-ray diffraction; Synchrotron radiation; Cinnabar phase

Document Type: Research article

Affiliations: 1: CMUV, Ed. Investigación, pl. 1, Dr. Moliner, 50, 46100-Burjassot, Valencia, Spain Tel.: (34) 96 3 86 46 17; Fax: (34) 96 3 98 31 4; E-mail: domingo.martinez@uv.es 2: PMC, Université P. et M. Curie, T13, E4, B77, 4 Place Jussieu, 75252-Paris, France 3: LURE, Bat. 209D, Centre Universitaire Paris-Sud, 91405-Orsay, France

Publication date: 2002-01-01

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