Recording performance of the combination of magnetoresistive head and thin metal evaporated tape

Autor:	Akihiko Okabe, K. Kagawa, M. Takiguchi, Kazuhiko Hayashi, S. Yoshida, Y. Okazaki, Nobuhiro Sugawara, Toshihiko Yaoi
Rok vydání:	1997
Předmět:	Tape hiss Materials science Magnetoresistance business.industry Equalization (audio) General Physics and Astronomy Coercivity Noise (electronics) law.invention Nuclear magnetic resonance Interference (communication) law Shielded cable Optoelectronics Head (vessel) business
Zdroj:	Journal of Applied Physics. 81:4527-4529
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.364941
Popis:	Thin metal evaporated (ME) tape with low remanence-thickness product (Mrδ), high coercivity (Hc) and low noise was designed to match a magnetoresistive (MR) head. This article focuses on the high density recording performance of a shielded MR head/thin ME tape media designed for use with an MR head. The PW50 measurement was adopted to certify that the depth of recording was restricted by magnetic layer thickness. Reduced second harmonic distortion at low density shows saturation-free operation of the MR head. Frequency domain measurements indicate drastically reduced ac erase noise level and higher output level at short wave length. High readback density (neglecting intertrack interference) of 1.07 Gbits/in2 with signal-to-noise ratio (SNR) after equalization of 18.7 dB was attained for a FeNi (AMR) head and 1.29 Gbits/in.2 with SNR of 20.0 dB for a spin-valve (GMR) head. The performance of the MR head/thin ME tape system was compared to commercial ME tape and thin metal particulate tape in terms of noise...
Databáze:	OpenAIRE
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