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http://dx.doi.org/10.4283/JMAG.2008.13.4.153

Spin-Torque Oscillator using a Perpendicular Polarizer with Double Free Layers  

Seo, Soo-Man (Department of Materials Science and Engineering, Korea University)
Lee, Kyung-Jin (Department of Materials Science and Engineering, Korea University)
Publication Information
Journal of Magnetics / v.13, no.4, 2008 , pp. 153-156 More about this Journal
Abstract
We conducted a micromagnetic modeling study to investigate the spin torque oscillator (STO) using a perpendicular polarizer. We used an additional layer of negative anisotropy constant materials (NAM) on a conventional STO. For the NAM layer, the magnetic easy plane is parallel to the in-plane easy axis of the free layer, and inhibits the development of the out-of-plane component of the magnetization in the free layer. As a result, this new type of STO provides a high frequency limit up to 50 GHz.
Keywords
spin transfer torque; spin torque oscillator; anisotropy energy; negative anisotropy;
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