First-order magnetic and structural phase transitions in Fe1+ySexTe1-x
By Shiliang Li, C. D. Cruz, Q. Huang, Ying Chen, J. W. Lynn, Jiangping Hu, Yi-lin Huang, F. Hsu, K. Yeh, Maw‐Kuen Wu and 1 more. 2008
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We use bulk magnetic susceptibility, electronic specific heat, and neutron scattering to study structural and magnetic phase transitions in Fe1+ySexTe1-x. Fe1.068Te exhibits a first-order phase transition near 67 K with a tetragonal-to-monoclinic structural transition and simultaneously develops a collinear antiferromagnetic (AF) order responsible for the entropy change across the transition. Systematic studies of the FeSe1-xTex system reveal that the AF structure and lattice distortion in these materials are different from those of FeAs-based pnictides. These results call into question the conclusions of present density-functional calculations, where FeSe1-xTex and FeAs-based pnictides are expected to have similar Fermi surfaces and therefore the same spin-density wave AF order.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/8e6c1512b4c7e0b2ab32922e86c6bdd15baad046
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Citations in the corpus
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- Iron-based high transition temperature superconductors (2014, background): “[134] Li, SL, Cruz, Cdl and Huang, Q et al.”