Numerical Analysis of Thermally Assisted Magnetization Reversal in Rectangular MRAM Cells Consisted of Exchange Coupled Bilayer(Selected papers from MORIS 2006 Workshop on Thermal & Optical Magnetic Materials and Devices)
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概要
- 論文の詳細を見る
Time evolution of magnetization during a cooling process in thermally assisted magnetization reversal of rectangular MRAM cell has been numerically investigated by taking account of not only temperature variations of material parameters but also a thermal fluctuation effect. The rectangular MRAM cell with 100×150×20nm^3 in size is assumed, where the shape anisotropy dominates the switching property. The threshold amplitude of magnetic field required for a successful thermally assisted switching is decreased as the exchange stiffness constant is changed from 1×10^<-6> to 1×10^<-7> erg/cm. The time for the magnetization to relax into the bias field direction can be reduced by increasing the bias field amplitude. To switch the magnetization within 1ns, it is found that the bias field should be larger than 165 Oe. An exchange coupling field in a ferromagnetic bilayer system is considered to be available for producing such a large bias field required for a faster switching in thermally assisted MRAMs.
- 社団法人日本磁気学会の論文
- 2006-11-01
著者
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HASHIMOTO A.
Department of Cardiovascular Surgery The Heart Institute of Japan Tokyo Women's Medical Collese
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MATSUYAMA K.
Department of Chemical Engineering, Faculty of Engineering, Fukuoka University
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Nozaki Y.
Department Of Pediatrics And Department Of Anatomy Faculty Of Medicine Showa University
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Purnama B.
Department of Electronics, Kyushu Univ.
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Isowaki Y.
Department of Electronics, Kyushu Univ.
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- Numerical Analysis of Thermally Assisted Magnetization Reversal in Rectangular MRAM Cells Consisted of Exchange Coupled Bilayer(Selected papers from MORIS 2006 Workshop on Thermal & Optical Magnetic Materials and Devices)