Magnetic properties lithium-doped manganite single crystals
S. N. Barilo, G. L. Bychkov, V. I. Gatalskaya, L. A. Kurochkin, and V. P. Sokol
Institute of Solid State and Semiconductor Physics of National Academy of Science of Belarus 17 P. Brovki Str., Minsk 220072, Belarus
H. Szymczak, R. Szymczak, and M. Baran
Institute of Physics of Polish Academy of Science, 32/46 Al. Lotnikov Str., Warsaw 02-668, Poland
Received October 26, 2000
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 TC=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 ~ 8% at an external field of 9 kOe. The different dependence of the magnetizations MFC and MZFC of the sample with lower lithium content in the temperature range below TC is associated with the formation of a cluster glass and is caused by high coercivity and magnetic anisotropy of the crystal.