Magneto-optical investigation of spin polarisation of and

Interface effects and the evolution of ferromagnetism in La2/3Sr1/3MnO3ultrathin films

“…The spectra in figure 1 exhibit similar spectral behavior to previously published magneto-optical studies on thin films [23, 24], thick films [25], crystalline pellets [29] and bulk crystals [30]. A splitting of the negative peak in the Kerr rotation spectrum is clearly visible near 3.7 eV.…”

“…It can be used as a depth-sensitive technique to probe the magnetic properties throughout the studied system, giving a unique chance to study the evolution of the magnetism in the vicinity of the LSMO/STO interface. Previous magneto-optical studies were focused on LSMO thin films (with thickness from 20 to 40 nm) [23, 24], thick films (with thickness from 50 to 300 nm) [25–28], crystalline pellets [29] and bulk crystals [30]. Since the magneto-optical Kerr effect is proportional to the magnetization M in the film, ultrathin films exhibit extremely small angles of the Kerr rotation and ellipticity, requiring a high sensitivity experimental magneto-optical setup.…”

Pulsed laser deposition and characterization of La1−xSrxMnO3

“…On the other hand, it is well known that manganese ions determine the magnetic properties of the manganites, since they contribute with five degenerated levels into the 3d atomic level, split into 3 sublevels, t 2g and 2 e g due to the crystal field of the oxygen ions [11]. Hence, transitions between the sublevels of Mn þ 3 and Mn þ 4 d levels are expected.…”

Ferromagnetic manganites: spin-polarized conduction versus competing interactions

“…Magneto-optical techniques applied to manganite films include Kerr microscopy and spectroscopy [154][155][156], sometimes using a garnet indicator film covering the sample [155,157], magnetooptic ellipsometry [158] and second harmonic generation (SHG) [159,160]. Pump-probe Kerr spectroscopy [161] allows one to investigate magnetic surface dynamics in the picoseconds range.…”