Title :
Exchange Anisotropy in Epitaxial
Author :
Chih-Yen Yang ; Chih-Huang Lai ; Sheng-Huang Huang ; Hsin-Erh Huang ; Hui-Yun Bor
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ.
Abstract :
(001) IrMn/CoFe epitaxial bilayers were fabricated on Si substrates at room temperature by using Cu underlayers. A double shifted loop was observed at the axis perpendicular to the exchange bias direction. The dependence of anisotropy on the IrMn thickness was studied. The magnetization reversal was investigated by using vector coil measurements and calculations based on Stoner-Wohlfarth model. A combination of reversible and irreversible rotation was observed for the magnetization reversal along the hard axis. Critical angles and fields at which irreversible rotation occurred were obtained through simulations
Keywords :
cobalt alloys; iridium alloys; iron alloys; magnetic anisotropy; magnetic epitaxial layers; magnetisation reversal; manganese alloys; silicon; IrMn-CoFe; Stoner-Wohlfarth model; copper underlayers; double shifted loop; epitaxial (001) system; epitaxial bilayers; exchange anisotropy; magnetization reversal; vector coil measurements; Anisotropic magnetoresistance; Coils; Crystallization; Iron; Magnetic tunneling; Magnetization reversal; Substrates; Temperature; Tunneling magnetoresistance; Vibration measurement; (001) IrMn/CoFe; double shifted loop; exchange bias; magnetization reversal;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879155
