Last week two European scientists obtained the physics Nobel Prize , they were occupied by the study of magneto-resistance effect . The effect of gigantic magneto-resistance was opened in 1988, and in 1997 IBM company released the first hard disk, which uses this effect. Developments with the use of gigantic magneto-resistance allow to increase the sensitivity of hard disks magnetic heads and as result the possibility to increase the writing volume and to decrease the hard disks sizes .
Hitachi company today reported that it developed the smallest in world reading heads for hard disks, which use a new effect of gigantic magneto-resistance, adapted to the special features of perpendicular record technology . New heads type have two times smaller sizes, and will allow up to 2009-2011 to increase the volumes of desktop hard disks to 4 Tb (4000 Gb), and the volumes of mobile hard disks - to 1 Tb (1000 Gb).
The first hard disks generation with this new technology will appear in 2009, two years later developers hope to step over the nanometre boundary. Present disk generation with perpendicular record uses heads with tunnel effect gigantic magneto-resistance.