Study of magnetic properties, Fermi liquid, and non-Fermi liquid behavior of SrRuO3-Sr3Ru2O7 composite systems

Abstract

SrRuO₃ and Sr₃Ru₂O₇ are members of Ruddlesden-Popper (R-P) series. SrRuO₃ is a ferromagnetic metal whereas Sr₃Ru₂O₇ is a paramagnetic metal. We have synthesized SrRuO₃-Sr₃Ru₂O₇ composite systems and have studied the magnetic, Fermi liquid, non-Fermi liquid behavior and electronic structures of these systems. We observed that magnetization decreases and resistivity increases with increase in Sr₃Ru₂O₇ phase, while the Curie temperature did not show any significant change. Moreover, we observed that Fermi-liquid behavior of SrRuO₃ is mostly dominant below 38 K in pure SrRuO₃. With increase in Sr₃Ru₂O₇ phase the Fermi-liquid region slightly reduced to below 33 K, whereas the non-Fermi liquid region remained unchanged.