微細加工したMn 酸化物積層膜のCPP 電気伝導

抄録

We investigated electrical transport properties in the current-perpendicular-to-plane (CPP) configuration for micro-fabricated manganese oxides (La_1-xSr_xMnO₃). The resistivities in the CPP configuration for La_0.9Sr_0.1MnO₃ and for La_0.7Sr_0.3MnO₃/La_0.9Sr_0.1MnO₃ decreased with an increase in the measuring current while the ferromagnetic Curie temperatures for the same materials increased. We found no qualitative difference between La_0.9Sr_0.1MnO₃ and La_0.7Sr_0.3MnO₃/La_0.9Sr_0.1MnO₃, indicating that spin-polarized currents from La_0.7Sr_0.3MnO₃ into La_0.9Sr_0.1MnO₃ had no major effect on the transport in La_0.9Sr_0.1MnO₃.