PYROELECTRICAL AND EMISSION PROPERTIES OF SURFACE LAYERS FOR FERROELECTRICS OF TRIGLYCINESULPHATE GROUP AND FERROELECTRICS-SEMICONDUCTORS OF TIN TIOHYPODIPHOSPHATE AND LEAD GERMANATE

Surface layers for crystals of triglycinesulphate, deutered triglycinesulphate, tin tiohypodiphosphate, lead germanate, antimony chalkohenide material are considered in the paper aiming at the complex investigation of pyroelectrical and emission properties of surface layers for crystals of TGS group. The comparative investigation of the given properties of TGS group crystals, which are dielectrics with properties of ferroelectrics-semiconductors Sn*002P*002S*006, Pb*005Ge*003O*001*001 KHGS-2 is also the aim of the paper. Pyroelectrical characteristics of surface layers have been investigated. The role of a surface layer in the process of the screening for the spontaneous polarity has been established. A layer with the inverse polarity in TGS crystals has been detected in the field of the phase transition. The influence of semiconducting properties on the character of the P*00c distribution has been detected. The influence of semiconducting properties of ferroelectrics has been developed. The methodology represented makes it possible to determine the presence of layers of a volumetric charge in a crystal and layers, the polarity of which differs from the polarity of the main volume of a crystal. The methodology makes it possible to estimate the thickness of these layers. The paper results may find their field of application in pyroreceivers, targets of pyrovideoconesAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio