Correlation between Magnetic Phases and Insulator-Metal Transition in La1/3Nd1/3Ca1/3MnO3 Perovskite
J. Baszyńskia, B. Idzikowskia, T. Tolińskia and A. Hoserb
a Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
b Hahn-Meitner-Institut, Glienicker Strasse 100, 14109 Berlin, Germany
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The La1/3Nd1/3Ca1/3MnO3 ceramic perovskites are investigated using the neutron diffraction technique and resistance measurements in the temperature range from 260 K down to 5 K. We have found that the integrated intensity of the antiferromagnetic peaks was growing with decreasing temperature and reached the maximum at a temperature about 20 K lower than that of the semiconductor-metal transition and did not vanish at 5 K. The semiconductor-metal transition is correlated with the temperature of the maximum of the lattice c-parameter and the percolation of ferromagnetic domains. Our results suggest that although the ferromagnetic long-range order is established through the semiconductor-metal transition induced percolation network, locally the antiferromagnetic correlation can remain.
DOI: 10.12693/APhysPolA.97.779
PACS numbers: 71.30.+h, 75.25.+z