A new ultra-violet magneto-optical spectroscopic instrument and its application to Co-based multilayers and thin films

Ab initiomagneto-optical Kerr spectra for solid systems with reduction dimensions

“…The calculated Kerr angles for the (111) surface orientation are in a qualitatively good agreement with the experimental data from van Drent and Suzuki [33,34]. Although the peaks in the theoretical spectra are all centered at lower photon energies than in experiments, the measured oscillations of Kerr angles in the case of Co(3 Å )/Pt(11 Å ) layers are well reproduced by the calculations.…”

“…A reason of this shift in energy is the Pt substrate used in calculations, which has a significantly smaller lattice constant (3.92 Å ) than Si (5.43 Å ) or 800 Å SiN used as support for the layered samples during the deposition. Thus quite obviously the bandstructure of all Co/Pt layered systems investigated in here is wider than that of the measured probes [33]. Quantitatively, the calculated Kerr angles are approximatively 15 times smaller in magnitude than the experimental ones.…”

“…The dip around 3.7 eV -reproduced by the calculations with a shift of 0.5 eV towards the lower photon energies -is ascribed by van Drent and Suzuki [34] to the Ab initio magneto-optical Kerr spectra for solid systems high polarization of the Pt layers below the ferromagnetic Co surface. But the same authors could not uniquely assign the other negative peak in the ultra-violet range around 5 eV to the contribution arising from the Co [33,34].…”

Magnetic and magneto-optical properties of (FeCo)3Pt alloy thin films

“…Fig. 4(a) shows the photon energy dependence of Kerr rotation of (1 0 0) and (1 1 1) (FeCo) 3 Pt sample grown onto MgO(1 0 0) and Al 2 O 3 (0 0 Á 1) and the present results are compared with the previous published results of FCC Co (1 1 1) and (1 0 0) sample measured by Van Drent et al [8]. Although for the case of FCC Co, the Kerr rotation variation is noticeable due to the its different orientation, the variation of Kerr rotation of (FeCo) 3 Pt case is not significant for its different orientation.…”

Magnetic and magneto-optical properties of FeRh thin films

“…A vibrating sample magnetometer (VSM) with a maximum applied field of 15 kOe was used to measure the magnetic properties of the films in the range from T ¼ À196 to 350 1C. A homemade ultra-wide band magneto-optical Kerr effect (MOKE) apparatus [9] with a maximum applied field of 20 kOe was employed to characterize the magneto-optical properties of the samples at varied temperatures from T ¼ 25 to 200 1C. Fig.…”