Engineered interface of magnetic oxides.
Interface-selective probing of magnetism is a key issue for the design and realization of spin-electronic junction devices. Here, magnetization-induced second-harmonic generation was used to probe the local magnetic properties at the interface of the perovskite ferromagnet La(0.6)Sr(0.4)MnO3 with nonmagnetic insulating layers, as used in spin-tunnel junctions. We show that by grading the doping profile on an atomic scale at the interface, robust ferromagnetism can be realized around room temperature. The results should lead to improvements in the performance of spin-tunnel junctions.
Yamada
Hiroyuki
H
Correlated Electron Research Center (CERC), National Institute of Advanced Science and Technology (AIST), Tsukuba 305-8562, Japan.
Ogawa
Yoshihiro
Y
Ishii
Yuji
Y
Sato
Hiroshi
H
Kawasaki
Masashi
M
Akoh
Hiroshi
H
Tokura
Yoshinori
Y