Patent ID: 6404605
Filing Date: 2002-06-11
Classification: B82Y,G11B

Abstract:
A magnetic recording and reading device having a transfer rate which is not less than 50 MB/s and which comprises:a magnetic recording medium having an absolute value of normalized noise coefficient per recording density of not more than 2.5Ã—10âˆ’8 (&mgr;Vrms)(inch)(&mgr;m)0.5/(&mgr;Vpp); a magnetic head which is mounted on an integrated circuit suspension so that a total inductance is reduced to be not more than 65 nH and having a magnetic core which is not more than 35 &mgr;m of length, a part of the magnetic core being formed by a magnetic film having a resistivity exceeding at least 50 &mgr;&OHgr;cm or by a multilayer film consisting of a magnetic film and an insulating film; and a fast R/W-IC having a line width of not more than 0.35 &mgr;m; wherein said magnetic head is provided with a reading element comprising one of a giant magnetoresistance effect element and a thin film having tunneling-magnetoresistance effect, with an effective track width of not more than 0.9 &mgr;m, and performs reading of magnetic information at an areal density of not less than 5 Gb/in2; and wherein said magnetic recording medium has a magnetic layer which comprises at least one metal element selected from the group consisting of Co, Fe and Ni as a primary component, at least two elements selected from a second group consisting of Cr, Mo, W, V, Nb, Ta, Ti, Zr, Hf, Pd, Pt, Rh, Ir and Si, and at least one element selected from a third group consisting La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Bi, Sb, Pb, Sn, Ge and B.