DocumentCode :
2934035
Title :
Electrically Tunable Susceptibility of Synthetic Antiferromagnet Lines
Author :
An, N. ; Jander, A.
Author_Institution :
Oregon State Univ., Corvallis
fYear :
2006
fDate :
8-12 May 2006
Firstpage :
63
Lastpage :
63
Abstract :
In this paper, a novel mechanism is introduced by which to modulate the permeability of a magnetic core is studied. This analysis has shown that a current passing through a coupled magnetic bilayer called a synthetic antiferromagnet (SAF) can change its effective permeability over a wide range. A key advantage of this mechanism is that SAF layers are resistant to magnetic domain formation and thus will allow high quality, low noise devices in small form factors. The electrically tunable magnetic device considered here is a magnetic thin film bilayer consisting of two ferromagnetic films (e.g. NiFe) coupled through an intervening nonmagnetic spacer layer (e.g. Cu). Description of the magnetization behavior in this coupled bilayers takes into account the effect of thickness (t), width (w), magnetization (Ms), induced anisotropy of the two layers (Ke), exchange coupling between the two layers (Ka), external magnetic field and self-field due to current flowing through the structure. With the aid of numerical calculation, the ability to induce large changes in susceptibility with reasonable current was predicted.
Keywords :
antiferromagnetic materials; copper; exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic cores; magnetic multilayers; magnetic permeability; magnetic susceptibility; magnetoresistive devices; nickel alloys; numerical analysis; NiFe-Cu; anisotropy; coupled magnetic bilayer; electrically tunable magnetic device; electrically tunable susceptibility; exchange coupling; ferromagnetic films; magnetic core; magnetic domain; magnetic thin film bilayer; magnetization; numerical calculation; permeability; synthetic antiferromagnet; synthetic antiferromagnet lines; Antiferromagnetic materials; Couplings; Magnetic analysis; Magnetic anisotropy; Magnetic cores; Magnetic domains; Magnetic films; Magnetic modulators; Magnetization; Permeability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
Type :
conf
DOI :
10.1109/INTMAG.2006.375563
Filename :
4261497
Link To Document :
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