Magnetic phase diagram of the Bi1-xCaxMnO3 manganites |
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Authors: | I. O. Troyanchuk O. S. Mantytskaya A. N. Chobot |
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Affiliation: | (1) Institute of Solid-State and Semiconductor Physics, National Academy of Sciences of Belarus, Minsk, 220076, Belarus |
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Abstract: | The magnetic and elastic properties of the Bi1-xCaxMnO3 manganites are studied. The phase transformations revealed are ferromagnet-spin glass (x≥0.15) and spin glass-charge-ordered antiferromagnet (x≥0.25). The ferromagnetic state is characterized by ordering of the Mn3+d x 2-y orbitals. It is suggested that thespin glass state originates from local static Jahn-Teller distortions. The antiferromagnetic charge-ordered and the spin-glass disordered phases coexist in samples with 0.25<x<0.32, which may be due to the charge order-disorder phase transformation being martensitic in character. The magnetic phase diagram is constructed. |
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