Preparation and read/write characteristics of Co-γFe_2O_3/NiO longitudinal magnetic recording media

Co-γFe_2O_3/NiO長手磁気記録媒体の作製と記録再生特性

Preparation and read/write characteristics of Co-γFe_2O_3/NiO longitudinal magnetic recording media

Creators 土井 孝紀

Creators 田万里 耕作

Creators 柿原 康男

Creators Yamamoto Setsuo

Creators Kurisu Hiroki

Creators 松浦 満

Co-γFe_2O_3 longitudinal magnetic recording media obtained by annealing CoO-Fe_3O_4 were prepared on NiO underlayer. The coercivity H_c was varied with the Co content, namely, the atomic ratio of Co/Fe in Co-γFe_2O_3, and the oxygen partial pressure in deposition of CoO-Fe_3O_4. The Hc of the media with Co/Fe = 4 at% was 2000-3500 Oe, 1.3-3.6 times higher than that of Co-γFe_2O_3 media without NiO underlayer. The grain size of Co-γFe_2O_3 became smaller with decreasing the thickness. The read/write characteristics of the media with no overcoat were evaluated in contact recording. Co-γFe_2O_3 media on NiO had higher D_<50> and lower medium noise than those of the media without NiO underlayer.

[ISSN]0285-0192

[NCID]AN0031390X

https://doi.org/10.3379/jmsjmag.22.125

[isPartOf] [URI]http://www.wdc-jp.com/msj/journal/index.html