An Analytical Model to Study the Transfer of Magnetic Pattern From Videotape to Garnet Film

The magneto-optical readout system based on a signal transfer from videotape to magnetic garnet film has been proposed. To find the garnet film suitable for this system, we developed an analytical pattern of transfer readout. The garnet film considered has a magnetization almost in-plane but slightl...

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Published inIEEE transactions on magnetics Vol. 48; no. 5; pp. 1863 - 1868
Main Authors Nomura, Tatsuo, Kishida, Masahiko, Hayashi, Naoto, Iwasaki, Katsuhiro, Umezawa, Hiromitsu
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.05.2012
Institute of Electrical and Electronics Engineers
Subjects
Analytical model of transfer
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Faraday rotation
Garnet films
Magnetic domains
magnetic garnet film
Magnetic recording
Magnetic resonance imaging
magnetic tape
Magnetization
magneto-optic indicator films
magneto-optical readout
Materials science
Other topics in materials science
Physics
Magnetic tapes
Faraday rotation
magnetic tape
magneto-optic indicator films
magnetic garnet film
Magnetic materials
Mathematical models
Modelling
Analytical model of transfer
magneto-optical readout
Magnetic properties
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Abstract The magneto-optical readout system based on a signal transfer from videotape to magnetic garnet film has been proposed. To find the garnet film suitable for this system, we developed an analytical pattern of transfer readout. The garnet film considered has a magnetization almost in-plane but slightly inclined with respect to the film plane. On the basis of this model, when a videotape on which the bit length of 0.4 μm was recorded and brought close to the garnet film, the tilt angle of magnetization was estimated to be about 5 degrees for the garnet film with thickness of 0.6 μm, magnetization of 3 × 10 -2 Wb/m 2 , and saturation field of 39 kA/m. The transfer of bit patterns from videotape to garnet film was demonstrated by using a polarizing microscope. The dependence of signal level on bit length obtained by the readout experiment with laser beam in which videotape was moved agreed well with that predicted by calculation.
AbstractList The magneto-optical readout system based on a signal transfer from videotape to magnetic garnet film has been proposed. To find the garnet film suitable for this system, we developed an analytical pattern of transfer readout. The garnet film considered has a magnetization almost in-plane but slightly inclined with respect to the film plane. On the basis of this model, when a videotape on which the bit length of 0.4 μm was recorded and brought close to the garnet film, the tilt angle of magnetization was estimated to be about 5 degrees for the garnet film with thickness of 0.6 μm, magnetization of 3 × 10 -2 Wb/m 2 , and saturation field of 39 kA/m. The transfer of bit patterns from videotape to garnet film was demonstrated by using a polarizing microscope. The dependence of signal level on bit length obtained by the readout experiment with laser beam in which videotape was moved agreed well with that predicted by calculation.
Author Kishida, Masahiko
Hayashi, Naoto
Umezawa, Hiromitsu
Nomura, Tatsuo
Iwasaki, Katsuhiro
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crossref_primary_10_1109_JPHOT_2016_2557242
crossref_primary_10_1109_JPHOT_2017_2692216
Cites_doi 10.1109/TMAG.1981.1061590
10.1109/TMAG.2009.2023066
10.1109/TMAG.2009.2023067
10.1109/20.488293
10.1109/TMAG.2008.2002389
10.1063/1.113421
10.1109/TMAG.2006.878416
10.1143/JPSJ.19.1116
10.1109/TMAG.1985.1063995
10.1166/sl.2007.023
10.1109/TMAG.2006.880997
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10.1109/TMAG.2008.2001623
10.1117/12.950004
10.1016/j.jmmm.2010.04.015
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Issue 5
Keywords Magnetic tapes
Faraday rotation
magnetic tape
magneto-optic indicator films
magnetic garnet film
Magnetic materials
Mathematical models
Modelling
Analytical model of transfer
magneto-optical readout
Magnetic properties
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SubjectTerms Analytical model of transfer
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Faraday rotation
Garnet films
Magnetic domains
magnetic garnet film
Magnetic recording
Magnetic resonance imaging
magnetic tape
Magnetization
magneto-optic indicator films
magneto-optical readout
Materials science
Other topics in materials science
Physics
Title An Analytical Model to Study the Transfer of Magnetic Pattern From Videotape to Garnet Film
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Volume 48
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