Title :
Effect of underlayer microstructure on the exchange coupling of Mumetal-Al oxide-Co multilayer
Author :
Young-woo Lee ; Lee, T.H. ; Kim, C.G. ; Kim, C.O. ; Yoon, T.S.
Author_Institution :
Dept. of Mater. Eng., Chungnam Nat. Univ., Taejon, South Korea
fDate :
9/1/2002 12:00:00 AM
Abstract :
Exchange coupling of Mumetal(Ni77Fe14Mo5Cu4 wt%)-Al oxide-Co multilayers has been investigated as a function of Mumetal growth temperature. As Mumetal growth temperature increases from 20°C to 90°C, grain size and surface roughness increase simultaneously. The increase of grain size diminishes the exchange coupling up to 40°C, and increase of roughness increases exchange coupling after 40°C. It is thought that grain size and roughness of the underlayer are competing factors for the interlayer exchange coupling of the magnetic multilayer.
Keywords :
aluminium compounds; cobalt; coercive force; copper alloys; exchange interactions (electron); grain size; iron alloys; magnetic hysteresis; magnetic multilayers; magnetic switching; molybdenum alloys; nickel alloys; sputter deposition; surface topography; 20 to 90 degC; Mumetal growth temperature; Mumetal-Al oxide-Co multilayer; Ni77Fe14Mo5Cu4-Al2O3-Co; exchange coupling; grain size; interlayer exchange coupling; magnetic hysteresis loops; magnetic multilayer; rf magnetron sputtering; surface roughness; switching field; underlayer microstructure; Atomic force microscopy; Couplings; Grain size; Magnetic materials; Magnetic multilayers; Magnetic tunneling; Microstructure; Nonhomogeneous media; Scanning electron microscopy; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803116
