Structural and magnetic aspects of the metal-insulator transition in Ca 2-x Sr x RuO 4

By O. Friedt, M. Braden, Gilles André, P. Adelmann, S. Nakatsuji, Y. Maeno. 2000

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The phase diagram of ${\mathrm{Ca}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{RuO}}_{4}$ has been studied by neutron diffraction on powder and single-crystalline samples. The experiments reveal antiferromagnetic order and structural distortions characterized by tilts and rotations of the ${\mathrm{RuO}}_{6}$ octahedra. There is strong evidence that the structural details of the isovalent samples tune the magnetic as well as the electronic behavior. In particular we observe for low Sr concentration a metal-insulator transition associated with a structural change and magnetic ordering.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/39f57e5342831393d6cd9183ebe98d3d7ed7790f