Low-cost ultrahigh areal density optical disc system towards 400 Gbyte/disc

Abstract

Ref. [4] and Ref. [5] in that only the easy-axis anisotropy term is present whereas in our earlier work an easy-plane anisotropy term Was used in addition. In spite of the seemingly small difference between eq. (1) and the Hamiltonian used by Dynamical behavior of solitary waves in the form of kinks in a one dimensional driven damped ferromagnetic spin system is analysed. The Landau-LifshitzClilbert equation for this system is solved exactly. A balance between the effect of the diive field and that of the damping is found to be possible: stationary motion of the kink results with a constant velocity which is proportional to the product of the external magnetic field and of the Gilbert damping constant. The motion of the kink is accompanied by a constant and uniform precession of the spins.

A high transmittance optical recording material with long-term reliability for super-multilayer discs

“…[1][2][3][4][5] As a means of increasing the data storage capacity, several technologies have been reported, such as holographic technology, 6,7) near-field technology, 8,9) multilayer technology, [10][11][12][13][14][15][16] and others. [17][18][19][20][21][22][23][24] Among these, multilayer recording technology is a promising approach because it can utilize most technologies of the Blu-ray Disc™ system that is already in use as a commercial technology. 25) Because many recording layers are stacked in a supermultilayer disc, the intensities of the reading and recording lasers are attenuated at the deeper layers.…”