The magneto-optical Kerr effect of bilayer films Nd-Fe/Cu and Nd-Fe/Al

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347788· OSTI ID:5493149

Zhou, S M; Lu, M; Zhai, H R; Miao, Y Z; Tian, P B; Wang, H; Xu, Y B ^[1]; Huang, H B ^[2]

---

1. Department of Physics, Laboratory of Solid State Microstructure, Janjing University, Nanjing 210008, People's Repulic of China (CN) Center of Materials Analysis, Nanjing University, Nanjing 210008, People's Republic of China (CN)
2. A-M Center Southeastern University, (People's Republic of China)

Bilayers Nd-Fe/Cu and Nd-Fe/Al made by vacuum evaporation were studied. The magneto-optical Kerr effect (MOKE) and reflectivity spectra were measured. For Nd-Fe/Cu with low Nd content and small thickness of Nd-Fe layer there is a peak in the MOKE spectrum and a broad MOKE enhancement. The position is located near the plasma edge of Cu. When the content of Nd exceeds 37 at. %, there is no Kerr peak in the MOKE spectrum of Nd-Fe/Cu. When the thickness of the magnetic layer is larger but still less than the light penetration depth, the position of the peak moves towards the long-wavelength side. For Nd-Fe/Al there is a broad enhancement in the short-wavelength region, but no Kerr peak occurs no matter how the magnetic layer changes. The results presented show that the necessary conditions for MOKE enhancement in bilayers are suitable values of {ital n} and {ital k} of the reflector, whether the reflector has a plasma edge or not, and the enhancement also depends on the properties of the magnetic layer.

• OSTI ID: 5493149
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM
COATINGS
COPPER
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
ELEMENTS
IRON ALLOYS
KERR EFFECT
MAGNETO-OPTICAL EFFECTS
METALS
NEODYMIUM ALLOYS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
REFLECTIVITY
SURFACE PROPERTIES
TRANSITION ELEMENTS
VAPOR DEPOSITED COATINGS