J. Phys. IV France 07 (1997) C1-359-C1-360
Phase Transformation in the Eu1-xCaxMnO3 PerovskitesI.O. Troyanchuk1, H. Szymczak2, N.V. Samsonenko1 and A. Nabialek2
1 Institute of Physics of Solids and Semiconductors, Academy of Sciences of Belarus, P. Brovki 17, Minsk 220072, Belarus
2 Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland
Magnetization and crystal structure of Eu1-xCaxMnO3 (0≤x≤1) perovskite have been studied. It is shown that these compounds can be divided into four concentration regions in which different magnetic phases coexist. The antiferromagnetic phases are associated with the regular arrangement of Mn3+ and Mn4+ ions in ratios 1:0, 1:1, 1:3 and 0:1 respectively. The ferromagnetic phases are attributed to the charge disordered states and arise in 0≤x≤0.4 and 0.8≤x≤1 concentration regions. The samples x=0.8 and 0.85 show metamagnetic behavior which might result from destruction of the charge ordered (1:3) state.
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