Reconstruction of magnetic recording spatial pattern on the tape media by reflection electron beam tomography

Author

Nomizu, S. ; Yin, J. ; Ogawa, K. ; Matsuda, J.

Author_Institution

Fac. of Eng., Nagaoka Univ. of Technol., Niigata, Japan

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

4032

Lastpage

4034

Abstract

An investigation of magnetic recording spatial pattern on recorded/erased tape is given by using our reflection electron beam tomography. In our method, the electron beams are injected to the tape surface and the positions of the reflected electron beams are measured by a two-dimensional position sensitive detector (PSD). The three-dimensional magnetic stray fields at a distance of 0.4 cm from the tape surfaces are reconstructed using an algebraic reconstruction technique (ART) algorithm from the measured deflection vectors of the reflection electron beams. From the experimental results, we show the capability of our method for measuring three-dimensional magnetic stray fields just beyond the surfaces of magnetic materials and the possibility of our method for revealing magnetization structures on magnetic tapes

Keywords

electron beam applications; magnetic field measurement; magnetic tapes; signal reconstruction; tomography; algebraic reconstruction technique algorithm; magnetic recording spatial pattern; magnetization; reflection electron beam tomography; tape surface; three-dimensional magnetic stray field measurement; two-dimensional position sensitive detector; Electron beams; Magnetic field measurement; Magnetic materials; Magnetic recording; Optical reflection; Position measurement; Position sensitive particle detectors; Subspace constraints; Surface reconstruction; Tomography;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619653

Filename

619653