Effect of Al concentration on the pyroelectric properties of AlGaInP2 alloys

doi:10.18721/JPM.183.209

Effect of Al concentration on the pyroelectric properties of AlGaInP2 alloys

Condensed matter physics

Authors:

Shchenin A.S. Axenov V.Yu. Ankudinov A.V. Bert N.A. Kalyuzhniy N.A. Pirogov E.V. Salii R.A. Soshnikov I.P. Vlasov A.S. Mintairov A.M.

Abstract:

CuPt_B ordered AlGaInP₂ alloys grown on GaAs by MOVCD epitaxy were studied by structural (X-ray diffraction, electron microscopy), optical (photoluminescence) and Kelvin probe microscopy methods. A strong dependence of the layer surface potential on the alloy composition was found. The effect of martensitic transition in the ordered AlGaInP₂ layers was found to be in connection with the alloy composition: higher Al concentrations lead to an increase of the piezoelectric field changes and shorter recovery time (relaxation) of the layers after mechanical effect (cleavage).