Hiroyuki Mitsuhashi

Playback performance of ultrahigh-capacity tape media with nanosized composite advanced particle (NanoCAP)

We have developed nanosized composite advanced particles (NanoCAP) with spherical shape and high coercivity, and fabricated dual coated tape to evaluate playback performance. The spherical shape contributes to smooth surfaces and reduced boundary variation between the magnetic layer and underlayer. The fine particle size, 17 nm, yields low media noise and high signal-to-noise ratio. The high coercivity, compared to metal particulate media, contributes to high amplitude resolution (D50=170 kfci). We confirmed that write demagnetization is well restrained and that NanoCAP tape should show very good playback performance with a superior writer.

Playback performance of ultra high capacity tape media with nanosized spherical metal particles (NanoCAP)

A nanosized spherical metal particle (NanoCAP) with a very high coercivity up to 3000 Oe was developed. Its high coercivity was attributed to its crystalline anisotropy. In this paper, a magnetic recording tape with NanoCAP was fabricated and evaluated with respect to its playback performance. The resulting NanoCAP coating media rendered an adequate signal to noise ratio (SNR) value and high resolution.