Patent ID: 7177115

Claim:
A magnetic recording and reading device having a data transfer rate of more than 50 MB/s and a recording density of more than 5 Gb/in 2 , which comprises: a magnetic recording medium having a substrate and at least one magnetic recording layer formed above the substrate; a magnetic head enabling the data transfer rate of more than 50 MB/s and the recording density of more than 5 Gb/in 2 on the magnetic recording medium, the magnetic head comprising a recording head having a magnetic core with a magnetic core length l 1 of not more than 35 μm and having a resistivity of more than 50 μΩcm, and a reading head provided with a read element having a track width of not more than 0.9 μm; and a R/W-IC; wherein the at least one magnetic recording layer contains (1) at least one metal element selected from a first group consisting of Co, Fe and Ni as a primary component, (2) 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 (3) at least one element selected from a third group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Bi, Sb, Pb, Sn, Ge and B, said at least one element selected from the third group being in an amount of 0.1 to 15 atomic %.