Energy barriers for bit-encoding states based on 360° domain walls in ultrathin ferromagnetic nanorings
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منابع مشابه
Bit Storage by 360 Domain Walls in Ferromagnetic Nanorings
We propose a theoretical design for a magnetic memory cell, based on thin-film ferromagnetic nanorings, that can efficiently store, record, and read out information. An information bit is represented by the polarity of a stable 360 domain wall introduced into the ring. Switching between the two magnetization states is done by a current applied to a wire passing through the ring, whereby the 360...
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Gabriel D. Chaves-O'Flynn, Daniel Bedau, Eric Vanden-Eijnden, A. D. Kent D. L. Stein Department of Physics, New York University, 4Washington Place, New York, New York 10003, USA and Courant Institute of Mathematical Sciences, New York University, New York, New York, 10012 The stability of 2π domain walls in ferromagnetic nanorings is investigated via the calculation of the energy barrier that s...
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Magnetization states and hysteresis behavior of small ferromagnetic rings, of diameters 180–520 nm, have been investigated using magnetic force microscopy. In addition to the expected bi-domain ~‘‘onion’’! and flux-closed ~‘‘vortex’’! magnetization states, a metastable state has been found. This ‘‘twisted’’ state contains a 360° domain wall which can exist over a wide range of applied fields. F...
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تاریخ انتشار 2015