Structural and magnetic aspects of the metal insulator transition in Ca$_{2-x}$Sr$_x$RuO$_4$

Details Structural and magnetic aspects of the metal insulator transition in Ca$_{2-x}$Sr$_x$RuO$_4$ Structural and magnetic aspects of the metal insulator transition in Ca$_{2-x}$Sr$_x$RuO$_4$

2000-07-13

arxiv.org/abs/cond-mat/0007218v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.63.174432

The phase diagram of Ca$_{2-x}$Sr$_x$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 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.

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