Crystal Structure, Electrical, and Magnetic Properties of the New Ternary Compounds LnAIB14

Single crystals of new ternary compounds LnAIB14 (Ln  Tb, Dy, Ho, Er, Yb, Lu) are prepared by high-temperature solution growth. They crystallize in the MgAIB14 structure type. The crystal structure of HoAIB14 is determined by X-ray single-crystal diffractometry. The magnetization of LnAIB14 crystals is studied in the temperature range 5 to 280 K. The temperature dependence of the electrical resistance measured in the temperature range 1.5 to 300 K and data of the magnetoresistance in the fields up to 32 × 105 A/m at T =4.2 K are reported for single crystals of ErAIB14. Basing on the data obtained, LnAIB14compounds are considered to be a new group of magnetic semiconductors.