Open AccessMagnetooptical response of permalloy multilayer structures on different substrate in the IR–VIS–UV spectral range
Author(s) -
Rajkumar Patra,
R. Mattheis,
Hartmut Stöcker,
Manuel Monecke,
Georgeta Salvan,
Rudolf Schäfer,
Oliver G. Schmidt,
Heidemarie Schmidt
Publication year - 2019
Publication title -
journal of physics. d, applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.857
H-Index - 198
eISSN - 1361-6463
pISSN - 0022-3727
DOI - 10.1088/1361-6463/ab3c78
Subject(s) - permalloy , materials science , analytical chemistry (journal) , magnetization , substrate (aquarium) , saturation (graph theory) , spectral line , ellipsometry , alloy , thin film , condensed matter physics , chemistry , metallurgy , magnetic field , physics , nanotechnology , oceanography , mathematics , chromatography , combinatorics , astronomy , geology , quantum mechanics
The magnetooptical (MO) response of Ru/Py/Ta thin film stacks with 4, 8, and 17 nm thick Ni 81 Fe 19 permalloy (Py) films on a SiO 2 /Si and a ZnO substrate was measured by vector magnetooptical generalized ellipsometry. The MO response from VMOGE was modelled using a 4 × 4 Mueller matrix algorithm. The wavelength-dependent, substrate-independent and thickness-independent complex MO coupling constant ( Q ) of Py in the Ru/Py/Ta thin film stacks was extracted by fitting Mueller matrix difference spectra in the spectral range from 300 nm to 1000 nm. Although the composition-dependent saturation magnetization of Ni x Fe 1− x alloys ( x = 0.0…1.0), e.g. of Ni 81 Fe 19 , is predictable from the two saturation magnetization end points, the MO coupling constant of Ni x Fe 1− x is not predictable from the two Q end points. However, in a small alloy range (0.0 < x < 0.2 and 0.8 < x < 1.0) the composition-dependent Q of Ni x Fe 1− x can be interpolated from a sufficiently high number of analyzed Ni x Fe 1− x alloys. The available complex MO coupling constants of six different Ni x Fe 1− x ( x = 1.0 to 0.0) alloys were used to interpolate MO response of binary Ni x Fe 1− x alloys in the range from x = 0.0 to x = 1.0.