Characteristics of barium ferrite tape for magnetic contact duplication

Author

Noda, M. ; Okazaki, Y. ; Hara, K. ; Ogisu, K.

Author_Institution

Sony Magnetic Products Inc., Miyagi, Japan

Volume

26

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

81

Lastpage

86

Abstract

The magnetic properties and electromagnetic characteristics of Ba-ferrite tape for R-DAT magnetic contact duplication (MCD) were investigated. The tapes employed Ba-ferrite particles averaging 0.06 μm in diameter with an aspect ratio between 4 and 5. Ba-ferrite tapes were prepared with perpendicular, longitudinal, and no orientation, and their MCD and ring-head recording (RHR) characteristics were compared. Several distinctive characteristics were observed in MCD, and the desirability of perpendicular orientation at short wavelengths in MCD applications is clear. Tilted orientation was also investigated, and its output level was similar to that of perpendicular orientation in MCD, while in RHR it proved superior to perpendicular orientation in the short wavelength region. The magnetization mode of the slave tape was studied by waveform analysis using the FFT method and in conjunction with the tapes´ magnetic properties, such as uniaxial anisotropy energy, remanence coercivity, and squareness ratio

Keywords

barium compounds; coercive force; digital audio tape; ferrite applications; magnetic anisotropy; magnetic hysteresis; magnetic recording; magnetic tapes; magnetisation; remanence; waveform analysis; BaFe₁₂O₁₉ tape; FFT method; R-DAT; electromagnetic characteristics; ferrite tape; longitudinal orientation; magnetic contact duplication; magnetic properties; magnetization mode; perpendicular orientation; remanence coercivity; ring-head recording; slave tape; squareness ratio; tilted orientation; uniaxial anisotropy energy; waveform analysis; Anisotropic magnetoresistance; Barium; Coercive force; Ferrites; Magnetic anisotropy; Magnetic properties; Magnetization; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Remanence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.50497

Filename

50497