Diffraction analysis demonstrates ferromagnetic ordering along the hexagonal axis in chromium tellurides, indicating distinct structural distortions at low temperatures.
Neutron diffraction diagrams of Cr/sub 2/Te/sub 3/ and Cr/sub 5/Te/sub 6/ were run above and below the Curie points to investigate the magnetic ordering process. In both compounds the magnetic moments were found to order ferromagnetically with their direction along the hexagonal axis. On cooling Cr/ sub 2/Te/sub 3/ shows a contraction of the unit cell along the c-axis, but no atomic displacements. In Cr/sub 5/Te/sub 6/ no contraction is visible, but the tellurium atoms are slightly displaced in the c-axis direction. The monoclinic splitting in Cr/sub 5/Te/sub 6/ decreases at low temperatures. The average magnetic moments deduced are 2.70 mu /sub B/ for Cr/sub 2/Te/sub 3/ and 2.10 mu s for Cr/sub 5/Te/sub 6/. Possible reasons for the low magntic moments are discussed. (auth)
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Andresen et al. (1963) studied this question.