Micromagnetics of Ferromagnetic Nano-Devices Using the Fast Fourier Transform Method
Micromagnetic simulations are widely utilized to simulate magnetic properties of magnetic materials, performance of magnetic devices, and read/write processes in recording systems. In hard disk drives, the minimum size of devices is now scaled down to the nanometer region; therefore, micromagnetics...
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| Veröffentlicht in: | IEEE transactions on magnetics 2009-08, Vol.45 (8), p.3035-3045 |
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| container_title | IEEE transactions on magnetics |
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| creator | Dan Wei, Dan Wei Sumei Wang, Sumei Wang Zijin Ding, Zijin Ding Kai-Zhong Gao, Kai-Zhong Gao |
| description | Micromagnetic simulations are widely utilized to simulate magnetic properties of magnetic materials, performance of magnetic devices, and read/write processes in recording systems. In hard disk drives, the minimum size of devices is now scaled down to the nanometer region; therefore, micromagnetics should be accurate enough to include the edge effects in these ferromagnetic nano-devices. In this work, we consider devices with flat structures. The analytical forms of demagnetizing matrices for intra-cell and inter-cell interactions are calculated for cubic and right-angle triangular prism cells respectively, which enables accurate magnetostatic interaction calculation using fast Fourier transform (FFT) method in thin film devices with arbitrary geometry. Besides, the parallel computational method is included to speed up the programs. Two examples about the switching characteristics of ferromagnetic devices are given in this paper to evaluate the accuracy of the improved FFT methods: one is a hard magnetic nano-dot; the other is a write pole tip for perpendicular recording. |
| doi_str_mv | 10.1109/TMAG.2009.2017260 |
| format | Article |
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In hard disk drives, the minimum size of devices is now scaled down to the nanometer region; therefore, micromagnetics should be accurate enough to include the edge effects in these ferromagnetic nano-devices. In this work, we consider devices with flat structures. The analytical forms of demagnetizing matrices for intra-cell and inter-cell interactions are calculated for cubic and right-angle triangular prism cells respectively, which enables accurate magnetostatic interaction calculation using fast Fourier transform (FFT) method in thin film devices with arbitrary geometry. Besides, the parallel computational method is included to speed up the programs. 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In hard disk drives, the minimum size of devices is now scaled down to the nanometer region; therefore, micromagnetics should be accurate enough to include the edge effects in these ferromagnetic nano-devices. In this work, we consider devices with flat structures. The analytical forms of demagnetizing matrices for intra-cell and inter-cell interactions are calculated for cubic and right-angle triangular prism cells respectively, which enables accurate magnetostatic interaction calculation using fast Fourier transform (FFT) method in thin film devices with arbitrary geometry. Besides, the parallel computational method is included to speed up the programs. 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In hard disk drives, the minimum size of devices is now scaled down to the nanometer region; therefore, micromagnetics should be accurate enough to include the edge effects in these ferromagnetic nano-devices. In this work, we consider devices with flat structures. The analytical forms of demagnetizing matrices for intra-cell and inter-cell interactions are calculated for cubic and right-angle triangular prism cells respectively, which enables accurate magnetostatic interaction calculation using fast Fourier transform (FFT) method in thin film devices with arbitrary geometry. Besides, the parallel computational method is included to speed up the programs. 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| subjects | Computer simulation Cross-disciplinary physics: materials science rheology Devices Disk recording Exact sciences and technology Fast Fourier transform Fast Fourier transforms ferromagnetic device Ferromagnetism Fourier transforms head Magnetic devices Magnetic materials Magnetic properties Magnetic recording Magnetism Magnetostatics Materials science Mathematical analysis micromagnetic Micromagnetics nano-dot Nanocomposites Nanomaterials Nanoscale devices Nanostructure Other topics in materials science Perpendicular magnetic recording Physics Recording Studies switching |
| title | Micromagnetics of Ferromagnetic Nano-Devices Using the Fast Fourier Transform Method |
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