Anomalous charge transport in dodecaborides RB12 (R- Ho, Er, Tm, Lu)
Abstract
High precision measurements of Hall RH(T) and Seebeck S(T) coefficients have been carried out for the first time on single crystals of rare earth dodecaborides RB12 (R - Ho, Er, Tm, Lu) at temperatures 1.8 - 300K. Low temperature anomalies associated with antiferromagnetic phase transitions in HoB12, ErB12 and TmB12 compounds have been detected on the temperature dependencies of RH(T) and S(T). The estimated values of charge carriers mobility allowed us to conclude about the appreciable influence of spin fluctuations on the charge transport in these compounds with B12 atomic clusters.
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