Title :
Electrically Tunable Thin Film Magnetic Core Using Synthetic Antiferromagnet Structure
Author :
An, Na ; Jander, Albrecht ; Dhagat, Pallavi
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR
Abstract :
We demonstrate an electrically tunable thin-film magnetic core using a synthetic antiferromagnet (SAF) structure. It consists of two ferromagnetic layers antiferromagnetically coupled together through an exchange coupling layer. Variation of susceptibility is achieved by leading a current through the structure. A tuning range (relative change in susceptibility) of 35% can be achieved at 800 Hz by using patterned NiFe(12 nm)/Ru(0.7 nm)/NiFe(12 nm) SAF structures. Different patterns of test samples are designed to investigate the influence on the tuning performance.
Keywords :
antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic cores; magnetic multilayers; magnetic susceptibility; magnetic thin films; nickel alloys; ruthenium; synthetic metals; FeNi-Ru-FeNi; electrically tunable thin film magnetic core; exchange coupling layer; ferromagnetic layers; frequency 800 Hz; magnetic susceptibility; synthetic antiferromagnet structure; Inductor; magnetic susceptibility; synthetic antiferromagnet; tunable;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2008.2002804
