MQCA - EmergingTechnologiesof Computation MontekSingh...

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Emerging Technologies of  Computation Montek Singh COMP790-084 Sep 6, 2011
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Basics of magnetism Nanomagnets and their coupling Next class: Challenges and Benefits Open questions Today:   Magnetic  Quantum Dot  Cellular Automata (MQCA)
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Basics of magnetism Magnetic  domains Magnetic domains regions within magnetic material  with uniform magnetization… … separated by “domain walls” magnetic moments all exactly  aligned responsible for magnetic behavior  of  “ferromagnetic”  materials:  iron,  nickel, etc. What causes them? magneto-static energy is minimized Other energy terms: magnetoelastic anisotropy magnetocrystalline anisotropy
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Basics of magnetism Magnetic domains more domains reduces  magnetostatic energy but increases wall energy Single Domain (SD) 10 to 100nm is a good size
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Magnetization … under externally applied magnetic field (H)
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MQCA - EmergingTechnologiesof Computation MontekSingh...

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