ESR-Investigations on the Solid Solution Mg2-x CuxP4O12
ESR-investigations were performed on the solid solution Mg2-xCuxP4O12. The single ion spectrum shows a tetragonal g-tensor which is caused by a planar-quadratic dynamic Jahn-Teller effect. At 2 K a HFS is observed. Pure Cu2P4O12 exhibits a static Jahn-Teller-distortion even at room temperature. The onset of ferrimagnetic ordering below 8 K leads to a pronounced shift of the g-values.