Title :
Controlling the preferred orientation in granular CoCrPt:C thin films for high-areal density magnetic recording
Author :
Xu, Yingfan ; Wang, J.P. ; Pock, C.K. ; Cheng, Xiaomin ; Shan, Z.S. ; Chong, T.C.
Author_Institution :
Data Storage Inst., Singapore
fDate :
7/1/2001 12:00:00 AM
Abstract :
Magnetic and structural properties of hcp-(CoCrPt):C granular thin films for potential applications in high areal density recording media have been investigated. CrX (X=I, Ru, Mn) underlayers with and without NiAl seedlayer has been applied to improve the in-plane preferred orientation of the Co alloy grains. The addition of Ru or Mn to the Cr underlayer promotes Co (11.0) in-plane orientation; using a NiAl seedlayer promotes Co (10.0). For films with CrMn underlayer and NiAl seedlayer, Hc reaches 3360 Oe and Mrt decreases to 0.33 memu/cm2. Thermal stability and reversal properties have been studied by moment-decay measurements. These granular films possess good in-plane preferred orientation of the magnetic moment and c-axis, which is desirable for high areal density longitudinal recording
Keywords :
chromium alloys; chromium compounds; cobalt alloys; crystal microstructure; ferromagnetic materials; granular materials; magnetic moments; magnetic recording; magnetic thin films; magnetisation reversal; manganese alloys; platinum alloys; ruthenium alloys; thermal stability; Co alloy grains; CoCrPt:C; CrI; CrMn; CrRu; Hc; NiAl; NiAl seedlayer; c-axis; granular CoCrPt:C thin films; hcp-(CoCrPt):C granular thin films; high-areal density magnetic recording; in-plane preferred orientation; magnetic moment; magnetic properties; moment-decay measurements; preferred orientation; reversal properties; structural properties; thermal stability; Chromium; Cobalt alloys; Glass; Grain boundaries; Magnetic films; Magnetic recording; Manganese alloys; Sputtering; Transistors; X-ray scattering;
Journal_Title :
Magnetics, IEEE Transactions on
