Nonlinear magneto-optical kerr rotation of an oxide superlattice with artificially broken symmetry.
Simultaneously broken time-reversal and spatial-inversion symmetries can be realized in the epitaxially grown oxide "tricolor" superlattices composed of three sequential kinds of perovskite layers including a ferromagnetic one (manganese oxide). As a generic feature of such a system, the magnetic-field-induced second-harmonic generation and the resultant Kerr rotation of second-harmonic light were demonstrated. The signal intensity probes the interface magnetization of the superlattice, where temperature variation is shown to be distinct from the bulk feature.
Ogawa
Y
Y
Spin Superstructure Project, ERATO, Japan Science and Technology Corporation (JST), AIST Tsukuba Central 4, Tsukuba 305-8562, Japan.
Yamada
H
H
Ogasawara
T
T
Arima
T
T
Okamoto
H
H
Kawasaki
M
M
Tokura
Y
Y