A Magnetic Flower State-Based Memory Cell

Wang, N.; Wang, X. L.; Ruotolo, A.

doi:10.1109/tmag.2011.2128860

Cited by 1 publication

(3 citation statements)

References 17 publications

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“…The DV state (proposed as a bit-cell for magnetic solid state data storage [26]), was previously stabilized by enhanced roughness in circular Py disks [24] and by the introduction of notches in elliptical Py disks [26]. Here we introduce hole-nanostructured circular magnetic disks (2000 nm diameter, 30 nm thickness, made of cobalt) as elements where HAVs can be stabilized for a broad range of magnetic fields.…”

Section: Madrid Spainmentioning

confidence: 99%

“…The multihole circular disks considered here could serve as basic elements for multistate memories, similarly to the one suggested previously for elliptic dots with notches [26]. In order to take full advantage of the multilevel resistive states, one could incorporate nanostructured dots with multivortex states as one of the electrodes in magnetic tunnel junctions (MTJs).…”

Section: (A)mentioning

confidence: 99%

“…In our work we study the introduction of artificial pinning structures to guide magnetization reversal in circular disks through metastable magnetic configurations, which are close to a double vortex state (DV) formed by two half antivortices and two vortices connected via DWs [24,25]. The DV state (proposed as a bit-cell for magnetic solid state data storage [26]), was previously stabilized by enhanced roughness in circular Py disks [24] and by the introduction of notches in elliptical Py disks [26]. Here we introduce hole-nanostructured circular magnetic disks (2000 nm diameter, 30 nm thickness, made of cobalt) as elements where HAVs can be stabilized for a broad range of magnetic fields.…”

mentioning

confidence: 99%

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Magnetization reversal assisted by half antivortex states in nanostructured circular cobalt disks

Lara

Dobrovolskiy

Prieto

et al. 2014

Applied Physics Letters

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The half antivortex, a fundamental topological structure which determines magnetization reversal of submicron magnetic devices with domain walls, has been suggested also to play a crucial role in spin torque induced vortex core reversal in circular disks. Here we report on magnetization reversal in circular disks with nanoholes through consecutive metastable states with half antivortices. Inplane anisotropic magnetoresistance and broadband susceptibility measurements accompanied by micromagnetic simulations reveal that cobalt (Co) disks with two and three linearly arranged nanoholes directed at 45º and 135º degrees (º) with respect to the external magnetic field show reproducible step-like changes in the anisotropic magnetoresistance and magnetic permeability due to transitions between different intermediate states mediated by vortices and half antivortices confined to the dot nanoholes and edges, respectively. Our findings are relevant for the development of multi-hole based spintronic and magnetic memory devices.(*) Corresponding author: farkhad.aliev@uam.es

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Section: Madrid Spainmentioning

confidence: 99%

Section: (A)mentioning

confidence: 99%