Polar Kerr rotation in Co-doped hexagonal ferrites

Author

Simsa, Z. ; Gornert, P. ; Pointon, A.J. ; Gerber, R.

Author_Institution

Inst. of Phys., Czechoslovak Acad. of Sci., Prague, Czechoslovakia

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2789

Lastpage

2791

Abstract

The spectral dependencies of the polar Kerr rotation on a series of cobalt- and titanium-substituted single crystals of barium hexaferrites were measured in the visible and near-infrared region. Kerr rotations obtained on polished and etched (0001) surfaces were superior to the spectra obtained on the natural growth planes. The largest Kerr rotations (exceeding 4° at wavelengths of about 1800 nm) were found for molar concentrations of cobalt that were approximately equal to 0.04. Kerr-rotation hysteresis loops displayed small coercive force (<500 Oe) and small remanent values with a strong unidirectional character

Keywords

Kerr magneto-optical effect; barium compounds; coercive force; ferrites; magnetic hysteresis; remanence; 1800 nm; 900 to 1250 C; BaFe_12-x-yCo_xTi_yO₁₉ hexagonal ferrites; Kerr-rotation hysteresis loops; coercive force; etched (0001) surfaces; polar Kerr rotation; polished surface; remanence; spectral dependence; Cobalt; Crystals; Ferrites; Magnetooptic recording; Optical surface waves; Physics; Rotation measurement; Surface resistance; Surface treatment; Wavelength measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104875

Filename

104875