| Project/Area Number |
58065009
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| Research Category |
Grant-in-Aid for Specially Promoted Research
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| Allocation Type | Single-year Grants |
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| Research Institution | Department of Electrical Engineering, Kyushu University |
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Principal Investigator |
KONISHI Susumu Department of Electrical Engineering, Kyushu University, 工学部, 教授 (80029462)
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| Co-Investigator(Kenkyū-buntansha) |
KIMIHIDE Matsuyama Department of Electrical Engineering, Kyushu University, 工学部, 助手 (80165919)
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| Project Period (FY) |
1983 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥270,000,000 (Direct Cost: ¥270,000,000)
Fiscal Year 1986: ¥11,000,000 (Direct Cost: ¥11,000,000)
Fiscal Year 1985: ¥14,000,000 (Direct Cost: ¥14,000,000)
Fiscal Year 1984: ¥167,000,000 (Direct Cost: ¥167,000,000)
Fiscal Year 1983: ¥78,000,000 (Direct Cost: ¥78,000,000)
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| Keywords | Bloch line memory / magnetic wall / vertical Bloch line / stripe domain / finite difference method / CoPt Pattern / 溝パタン / 高周波磁壁振動法 / メモリ / ブロッホライン / 磁性記憶 / 磁壁微細構造 |
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| Research Abstract |
Computing model and simulation method have been extensively developed for magnetic domain walls and Bloch lines in magnetic garnet film. It has been found that the computer simulation can be a very powerful tool for studying Bloch line behaviors and for developing Bloch line memory. In this new memory, binary information is stored in the form of presence or absence of a Bloch line pair in stripe domain walls. The size of Bloch line is quite small, so that we can expect an 1 G bit/cm2 chip having reasonable access time if we use a garnet film supporting 0.5 um bubbles.
we have established the concepts of writing, reading annihilating, and propagating Bloch lines, and then confirmed these phenomina experimentally. We proposed the schemes stabilize anf initiate many stripe domains in parallel, and recently confirmed them experimentally, by grooving the garnet film. Now, the whole chip organization has been proposed as the first version, and chip fabrication for preliminary experiments has started in some companies. Quite exiting and successful research activities have been created in Japan and in outside countries.
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