Magnetic properties lithium-doped manganite single crystals

Magnetic and resistivity properties of La1-xLixMnO3 single crystals with the perovskite structure at lithium concentrations x=0.06 and 0.2 are investigated over a broad temperature range at fields of up to 50 kOe. The Curie temperature is T-C=90 K (x=0.06) and 300 K (x=0.2), respectively. The electrical resistance of the single crystal with x=0.06 increases steadily with temperature decrease, while the crystal with x=0.2 exhibits a magnetoresistance effect of similar to8% at an external field of 9 kOe. The different dependence of the magnetizations M-FC and M-ZFC of the sample with lower lithium content in the temperature range below T-C is associated with the formation of a cluster glass and is caused by high coercivity and magnetic anisotropy of the crystal. (C) 2001 American Institute of Physics.