CdTe:Mn was prepared by 200 keV Mn ion implantation to a dose of 5×1016 cm–2

The results demon-strate that the CdTe:Mn possesses ferroelectricity.X-ray diffraction measurement showed that the Mn+-implanted layer maintained zinc-blend structure

but the full width at half maximum(FWHM) of the Mn peak increased from.48 arcsec of the pristine sample to 146 arcsec of the implanted sample.XPS spectrum of Mn 2p core levels showed that the main peaks of the Mn 2p3/2 and Mn 2p1/2 located at 640.8 and 652.4 eV

respectively.Since the Mn 2p3/2 core level spectrum for elemental Mn is at 639.0 eV

this reveals that in the CdMnTe samples the Mn atoms are bonded with other elements.CL spectrum showed that the energy gap of Mn+-implanted sample was 1.50 eV

which is larger than that of CdTe

indicating alloying of the sample and formation of CdMnTe.These results provide evidence for the ferroelectricity of CdMnTe

which is attributed to the difference between the radii of Mn2+ and Cd2+in the ternary compound of CdMnTe.