A magnetic recording and reading device having a transfer rate of not less
than 50 MB/s includes a magnetic recording medium having an absolute value
of normalized noise coefficient per recording density of not more than
2.5.times.10.sup.-8 (.mu.Vrms)(inch)(.mu.m).sup.0.5 /(.mu.Vpp), and
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 .mu.m of length, wherein a part of
the magnetic core being formed by a magnetic film having a resistivity
exceeding at least 50 .mu..OMEGA.cm or by a multilayer film consisting of
a magnetic film and an insulating film. The device also includes a fast
R/W-IC having a line width of not more than 0.35 .mu.m which is installed
in a position within 2 cm from a rear end of the magnetic head.
