Tunable magnetic pole inversion in multiferroic BiFeO 3 –DyFeO 3 solid solution

We report an unusual magnetic pole inversion behaviour in multiferroic BiFeO 3 – x DyFeO 3 solid solution, which can be tuned by varying the concentration of the magnetic ion Dy in the solid solution. It is found that the temperature-induced magnetic pole inversion occurs in a wide composition range ( x = 0.14–0.90). Moreover, multiple magnetic pole inversions are observed in the solid solution compounds of high Dy-concentrations.