Temperature-dependent magnetic transitions in CoCrPt-Ru-CoCrPt synthetic ferrimagnets

Magnetic interactions in CoCrPt-oxide based perpendicular magnetic recording media

MgO seed layers for CoCrPt/Cr longitudinal magnetic recording media

Sputter deposited MgO thin films with the B1 crystal structure and ~002! film texture are used as seed layers to improve the texture and magnetic properties of the CoCrPt/Cr magnetic thin films on glass substrates for longitudinal recording. The desired ~002! textured Cr underlayers are usually obtained by sputtering Cr onto heated substrates. However, it is found that the MgO seed layers can i...

Interlayer exchange coupling in perpendicularly magnetized synthetic ferrimagnet structure using CoCrPt and CoFeB

Interlayer exchange coupling in synthetic ferrimagnet structures consisting of perpendicularly magnetized CoCrPt and in-plane magnetized CoFeB layers, which are coupled by a Ru thin spacer, were investigated. The magnetization of the CoFeB layer turned perpendicular to the film plane after annealing at 300°C because of the appearance of interlayer coupling from the CoCrPt layer. The coupling va...

Magnetization reversal behavior of nanogranular CoCrPt alloy thin films studied with magnetic transmission X-ray microscopy

Magnetic transmission soft X-ray microscopy has been used to study element—specifically the magnetization reversal behavior of (Co84Cr16)87Pt13 alloy thin films with a lateral resolution of 35 nm. Our results indicate that the magnetization switching is carried out by a random nucleation process that can be attributed to the reversal of individual grains. We found evidence of a large distributi...

Recording properties of CoCrPt tape media sputter-deposited at room temperature on polymeric substrates

Recording properties of CoCrPt thin films sputter-deposited on polymeric substrates at room temperature were investigated. Typical frequency spectra of the readback signal from sputtered tapes at various recording densities revealed an appreciable amount of modulation noise, despite the fact that the sputtered tape is expected to be smooth and conformal with the substrate. Atomic force microsco...