Magnetic Properties of EuBaCo 2 O 5.5 Single Crystals
M. Baran a , S.N. Barilo b , G.L. Bychkov b , V.I. Gatalskaya b , L.A. Kurochkin b , S.V. Shiryaev b , R. Szymczak a and H. Szymczak a
a Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
b Institute of Solid State and Semiconductor Physics, NAS, P. Brovki 17, 220072 Minsk, Belarus
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The static magnetization of the EuBaCo 2 O 5.5 single crystals was measured from helium to room temperatures for two configurations of the applied field: parallel and perpendicular to the c-axis. The compound is antiferromagnetic from helium temperature to about 210K. In low temperature region (below 45K) the antiferromagnetism coexists with a spin-glass-like state. The metamagnetic field-induced phase transition was observed in the antiferromagnetic phase for magnetic field applied perpendicular to the c-axis. The spontaneous phase transition from antiferromagnetic to weak ferromagnetic phase was established to be of the first order. This transition is accompanied by the appearance of the intermediate state. The weak ferromagnetic phase exists up to T c =240K.
DOI: 10.12693/APhysPolA.105.209
PACS numbers: 75.30.Cr, 75.50.Dd, 75.30.Gw, 75.30.Kz