Magnetic bubblecade memory based on chiral domain walls

Scientific Reports
Kyoung-Woong MoonSug-Bong Choe

Abstract

Unidirectional motion of magnetic domain walls is the key concept underlying next-generation domain-wall-mediated memory and logic devices. Such motion has been achieved either by injecting large electric currents into nanowires or by employing domain-wall tension induced by sophisticated structural modulation. Herein, we demonstrate a new scheme without any current injection or structural modulation. This scheme utilizes the recently discovered chiral domain walls, which exhibit asymmetry in their speed with respect to magnetic fields. Because of this asymmetry, an alternating magnetic field results in the coherent motion of the domain walls in one direction. Such coherent unidirectional motion is achieved even for an array of magnetic bubble domains, enabling the design of a new device prototype-magnetic bubblecade memory-with two-dimensional data-storage capability.

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Citations

May 28, 2019·Nature Materials·Duck-Ho KimTeruo Ono
Dec 29, 2018·Beilstein Journal of Nanotechnology·Alexander GaulArno Ehresmann
Apr 1, 2017·Scientific Reports·Duck-Ho KimSug-Bong Choe
Jun 18, 2017·Scientific Reports·Duck-Ho KimSug-Bong Choe
Feb 5, 2016·Scientific Reports·Jonathan LeliaertBartel Van Waeyenberge
Feb 6, 2016·Scientific Reports·Kyoung-Woong MoonChanyong Hwang
Dec 23, 2015·Nature Materials·Emilie JuéGilles Gaudin
Apr 13, 2017·Scientific Reports·Fanny UmmelenBert Koopmans
May 31, 2018·ACS Nano·Cristina BranManuel Vazquez

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