Development of Particulate Recording Media with Ultrathin Magnetic Layer

Hiroo INABA; Shinji SAITOH; Toshiyuki KITAHARA; Akira KASHIWAGI

Development of Particulate Recording Media with Ultrathin Magnetic Layer

Hiroo INABA, Shinji SAITOH, Toshiyuki KITAHARA, Akira KASHIWAGI

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A particulate recording medium with an ultrathin magnetic layer is presented in this paper. This medium consists of a magnetic layer and a nonmagnetic underlayer composed of very fine titanium dioxide powder. When metal powder was employed, we observed the anticipated advantages of decreasing the thickness of the magnetic layer in tapes and diskettes. By reducing the layer thickness to below 0.3 µm we were able to increase the reproduced output at short wavelengths, and improve both the overwrite erasability and the D50. There was also a decrease in the half peak width of an isolated pulse and a peak shift. Tribological advantages were also observed with this medium. When barium ferrite was employed as the magnetic powder, we observed that the modulation noise of thin-layer barium ferrite medium was less than that of a thinlayer MP medium while it generated an output as high as that of the MP medium. The advantages of the barium ferrite medium lie in its two-layer construction. Particulate media will continue to develop as magnetic powder is improved mainly in terms of its size, saturation magnetization, and coercivity.

Publication: IEICE TRANSACTIONS on Electronics Vol.E78-C No.11 pp.1536-1542

Publication Date: 1995/11/25

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Type of Manuscript: Special Section PAPER (Special Issue on Ultra High Density Information Storage Technologies)

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Hiroo INABA, Shinji SAITOH, Toshiyuki KITAHARA, Akira KASHIWAGI, "Development of Particulate Recording Media with Ultrathin Magnetic Layer" in IEICE TRANSACTIONS on Electronics, vol. E78-C, no. 11, pp. 1536-1542, November 1995, doi: .
Abstract: A particulate recording medium with an ultrathin magnetic layer is presented in this paper. This medium consists of a magnetic layer and a nonmagnetic underlayer composed of very fine titanium dioxide powder. When metal powder was employed, we observed the anticipated advantages of decreasing the thickness of the magnetic layer in tapes and diskettes. By reducing the layer thickness to below 0.3 µm we were able to increase the reproduced output at short wavelengths, and improve both the overwrite erasability and the D50. There was also a decrease in the half peak width of an isolated pulse and a peak shift. Tribological advantages were also observed with this medium. When barium ferrite was employed as the magnetic powder, we observed that the modulation noise of thin-layer barium ferrite medium was less than that of a thinlayer MP medium while it generated an output as high as that of the MP medium. The advantages of the barium ferrite medium lie in its two-layer construction. Particulate media will continue to develop as magnetic powder is improved mainly in terms of its size, saturation magnetization, and coercivity.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e78-c_11_1536/_p

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@ARTICLE{e78-c_11_1536,
author={Hiroo INABA, Shinji SAITOH, Toshiyuki KITAHARA, Akira KASHIWAGI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Development of Particulate Recording Media with Ultrathin Magnetic Layer},
year={1995},
volume={E78-C},
number={11},
pages={1536-1542},
abstract={A particulate recording medium with an ultrathin magnetic layer is presented in this paper. This medium consists of a magnetic layer and a nonmagnetic underlayer composed of very fine titanium dioxide powder. When metal powder was employed, we observed the anticipated advantages of decreasing the thickness of the magnetic layer in tapes and diskettes. By reducing the layer thickness to below 0.3 µm we were able to increase the reproduced output at short wavelengths, and improve both the overwrite erasability and the D50. There was also a decrease in the half peak width of an isolated pulse and a peak shift. Tribological advantages were also observed with this medium. When barium ferrite was employed as the magnetic powder, we observed that the modulation noise of thin-layer barium ferrite medium was less than that of a thinlayer MP medium while it generated an output as high as that of the MP medium. The advantages of the barium ferrite medium lie in its two-layer construction. Particulate media will continue to develop as magnetic powder is improved mainly in terms of its size, saturation magnetization, and coercivity.},
keywords={},
doi={},
ISSN={},
month={November},}

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TY - JOUR
TI - Development of Particulate Recording Media with Ultrathin Magnetic Layer
T2 - IEICE TRANSACTIONS on Electronics
SP - 1536
EP - 1542
AU - Hiroo INABA
AU - Shinji SAITOH
AU - Toshiyuki KITAHARA
AU - Akira KASHIWAGI
PY - 1995
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E78-C
IS - 11
JA - IEICE TRANSACTIONS on Electronics
Y1 - November 1995
AB - A particulate recording medium with an ultrathin magnetic layer is presented in this paper. This medium consists of a magnetic layer and a nonmagnetic underlayer composed of very fine titanium dioxide powder. When metal powder was employed, we observed the anticipated advantages of decreasing the thickness of the magnetic layer in tapes and diskettes. By reducing the layer thickness to below 0.3 µm we were able to increase the reproduced output at short wavelengths, and improve both the overwrite erasability and the D50. There was also a decrease in the half peak width of an isolated pulse and a peak shift. Tribological advantages were also observed with this medium. When barium ferrite was employed as the magnetic powder, we observed that the modulation noise of thin-layer barium ferrite medium was less than that of a thinlayer MP medium while it generated an output as high as that of the MP medium. The advantages of the barium ferrite medium lie in its two-layer construction. Particulate media will continue to develop as magnetic powder is improved mainly in terms of its size, saturation magnetization, and coercivity.
ER -