Electrolytic Growth and Properties of Transition Metal Compound Single Crystals

摘要

Single crystals of FeP, Fe2P, CoAs2 and FeAs2 were grown by either electrolysis of fused salts or chemical transport. Of these four compounds prepared to date, extensive studies have been carried out on well-characterized crystals of FeP. This compound exhibits metallic behavior throughout the temperature range of 4.2K to 298K. Anomalies in the magnetic susceptibility and resistivity curves at about 120K have been correlated with an ordered antiferromagnetic spiral. The other compounds have been chemically analyzed and their electrical and magnetic properties are being characterized. In addition, crystals of cadmium sulfide have been grown from the vapor phase with dimensions 12 mm long x 9 mm wide x 0.2 mm thick. The resistivity of these crystals was found to be 2,000,000 ohm-cm at room temperature. On heating these crystals to 800C for 4 hours and quenching to room temperature, the resistivity was found to be 219.3 ohm-cm. (Author)