Title :
Magnetic properties and thermal stability of electroplated NiFeCr and NiFeMo films with high resistivity
Author :
Hoshino, K. ; Sano, M. ; Narumi, S. ; Fuyama, M.
Author_Institution :
Central Res. Lab., Hitachi Ltd., Ibaraki, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
The magnetic properties and resistivity of electroplated Ni45 Fe55 films with added Cr or Mo were investigated in order to obtain write head materials with high resistivity for high frequency (a few hundred MHz) regions. The high resistivity of 60 μΩ cm and high magnetic flux density of 1.5T were obtained when 1.5at% of Cr or Mo were added to electroplated Ni45Fe55 films. The thermal stability and corrosion resistance of NiFe(Cr, Mo) films were the same as those of NiFe films. Furthermore, domain structures of the NiFe and NiFeCr top write-head core were observed. The easy axis of annealed films easily switched towards the track width direction in the head-yoke geometry
Keywords :
annealing; chromium alloys; corrosion resistance; electrical resistivity; electroplated coatings; ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic cores; magnetic domains; magnetic heads; magnetic switching; magnetic thin films; molybdenum alloys; nickel alloys; soft magnetic materials; thermal stability; 1.5 T; 2 MHz; 60 muohmcm; NiFeCr; NiFeMo; NiFeMo films; annealed films; corrosion resistance; domain structures; easy axis; electroplated Ni45Fe55 films; electroplated NiFeCr film; head-yoke geometry; high frequency; high magnetic flux density; high resistivity; magnetic properties; resistivity; thermal stability; top write-head core; track width direction; write head materials; Chromium; Conductivity; Frequency; Iron; Magnetic films; Magnetic heads; Magnetic materials; Magnetic properties; Thermal resistance; Thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
