Optical constants of Ni-Fe (Nickel-iron alloy, Permalloy)
Tikuišis et al. 2017: n,k 0.193–1.69 µm; gold-coated, 10 nm
Wavelength:
µm
(0.1930–1.6900)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Comments
10 nm thick Permalloy (80% nickel, 20% iron) film with protective 3 nm thick gold layer on top. Room temperature. Obtained by multi-angle spectroscopic ellipsometry.
References
K. K. Tikuišis, L. Beran, P. Cejpek, K. Uhlířová, J. Hamrle, M. Vaňatka, M. Urbánek, M. Veis. Optical and magneto-optical properties of permalloy thin films in 0.7-6.4 eV photon energy range, Mater. Des. 114, 31-39 (2017) (Numerical data kindly provided by Kristupas Kazimieras Tikuišis)
Data
INFO
Nickel-Iron alloys, Ni-Fe
Other names and abbreviations
- nickel–iron alloy
- FeNi
- NiFe
Popular alloys
- Invar (~36% Ni, low thermal expansion)
- Permalloy (~80% Ni, highly magnetic)