Patent ID: 6791803
Filing Date: 2004-09-14
Classification: G11B,Y10T

Abstract:
A magnetic recording and reproducing method for reproducing a signal magnetically recorded on a magnetic recording medium with a magnetoresistive (MR) head, whereinsaid magnetic recording medium comprises a substantially nonmagnetic lower layer and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on at least one side of a nonmagnetic support, in which said hexagonal ferrite ferromagnetic powder has a mean plate diameter ranging from 15 to 40 nm and a mean plate thickness ranging from 4 to 15 nm, and said magnetic layer has a coercive force Hc ranging from 143.3 to 318.4 kA/m, and said signal magnetically recorded has a maximum recording frequency ranging from 40 50 to 80 MHz.