ELECTRICAL CHARACTERIZATION OF LIQUID-PHASE EPITAXIALLY GROWN SINGLE-CRYSTAL FILMS OF MERCURY CADMIUM TELLURIDE BY VARIABLE-MAGNETIC-FIELD HALL MEASUREMENTS

We report a method for a new classification procedure for liquid-phase epitaxially grown mercury cadmium telluride single crystals. Variable -magnetic-field Hall measurements are performed on nine liquid-phase e pitaxially grown Hg0.78Cd0.22Te single-crystal films for magnetic fiel ds from 0 to 1.4 T and in the temperature range from 10 K to 300 K. Th e data from these measurements are analysed in the context of the redu ced-conductivity-tensor scheme proposed by Kim and co-workers. Based o n the degree of deviation from an ideal one-carrier behaviour, these e xperimental samples are classified into several types to emphasize the transition in the behaviour of the normal to anomalous n-type samples , finally leading to p-type samples. Our classification is also based on a general trend in the temperature dependence of the mobility and d ensity of the majority carriers, which were extracted from the magneto resistivity data. The classification provides a useful benchmark for m aterials characterization in the infrared detector industry.