Domain-Wall Dynamicsin Magnetic Logic Devices

Atkinson, D.; Faulkner, Colm C.; Allwood, D. A.; Cowburn, R. P.

doi:10.1007/10938171_6

Cited by 13 publications

(7 citation statements)

References 24 publications

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“…The development of prototype devices based upon magnetic domain devices has been pioneered by Cowburn and coworkers (Allwood et al, 2005;Cowburn, 2006a, 2006b;Atkinson et al, 2006) as listed and shown schematically in Fig. 1.…”

Section: E Domain Wall Motion: the Advantage Of Magnetic Domain Wallmentioning

confidence: 99%

Domain wall nanoelectronics

et al. 2012

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Domains in ferroelectrics were considered to be well understood by the middle of the last century: They were generally rectilinear, and their walls were Ising-like. Their simplicity stood in stark contrast to the more complex Bloch walls or Néel walls in magnets. Only within the past decade and with the introduction of atomic-resolution studies via transmission electron microscopy, electron holography, and atomic force microscopy with polarization sensitivity has their real complexity been revealed. Additional phenomena appear in recent studies, especially of magnetoelectric materials, where functional properties inside domain walls are being directly measured. In this paper these studies are reviewed, focusing attention on ferroelectrics and multiferroics but making comparisons where possible with magnetic domains and domain walls. An important part of this review will concern device applications, with the spotlight on a new paradigm of ferroic devices where the domain walls, rather than the domains, are the active element. Here magnetic wall microelectronics is already in full swing, owing largely to the work of Cowburn and of Parkin and their colleagues. These devices exploit the high domain wall mobilities in magnets and their resulting high velocities, which can be supersonic, as shown by Kreines' and co-workers 30 years ago. By comparison, nanoelectronic devices employing ferroelectric domain walls often have slower domain wall speeds, but may exploit their smaller size as well as their different functional properties. These include domain wall conductivity (metallic or even superconducting in bulk insulating or semiconducting oxides) and the fact that domain walls can be ferromagnetic while the surrounding domains are not.

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Section: E Domain Wall Motion: the Advantage Of Magnetic Domain Wallmentioning

confidence: 99%

Domain wall nanoelectronics

et al. 2012

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“…Single domain wall propagation is used in many magnetic devices like magnetic random access memory, different spintronic equipment or sensors [1,2]. Although the domain wall dynamics was studied for a long time, new phenomena arise when the dimensions of the applied elements decreases.…”

Section: Introductionmentioning

confidence: 99%

Single domain wall dynamics in thin magnetic wires

Varga

Kostyk

Zhukov

et al. 2008

Journal of Non-Crystalline Solids

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“…where the constant C is expressed by C = m n µ n 2π 2 = 2.31 × 10 −4 nm −2 T −1 (4) Here, m n is the neutron mass, µ n = γ n µ N is the neutron magnetic moment, where γ n =1.913 is the gyromagnetic ratio of neutrons and µ N is the nuclear magneton. The Eq.…”

Section: A Specular Reflectionmentioning

confidence: 99%

“…In case of domains, Eqs. (1)(2)(3)(4)(5) are also valid after averaging over the sample surface. Such averaging is easy to perform if the domains are sufficiently large so that each of them comprise a number of coherence ellipsoids.…”

Section: A Specular Reflectionmentioning

confidence: 99%

Artificial Magnetic Pattern Arrays Probed by Polarized Neutron Reflectivity

Gorkov

Toperverg

Zabel

2020

Preprint

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Traditionally, neutron scattering is an essential method for the analysis of spin structures and spin excitations in bulk materials. Over the last 30 years, polarized neutron scattering in terms of reflectometry has also contributed largely to the analysis of magnetic thin films and magnetic multilayers. More recently it has been shown that polarized neutron reflectivity is, in addition, a suitable tool for the study of thin films laterally patterned with magnetic stripes or islands. We provide a brief overview of the fundamental properties of polarized neutron reflectivity, considering different domain states, domain fluctuations, and different domain sizes with respect to the neutron coherence volume. The discussion is exemplified by a set of simulated reflectivities assuming either complete polarization and polarization analysis, or a reduced form of polarized neutron reflectivity without polarization analysis. Furthermore, we emphasize the importance of the neutron coherence volume for the interpretation of specular and off-specular intensity maps, in particular when studying laterally non-homogeneous magnetic films. Finally, experimental results, fits, and simulations are shown for specular and off-specular scattering from a magnetic film that has been lithographically patterned into a periodic stripe array. These experiments demonstrate the different and mutually complementary information that can be gained when orienting the stripe array parallel or perpendicular to the scattering plane.

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Domain-Wall Dynamicsin Magnetic Logic Devices

Cited by 13 publications

References 24 publications

Domain wall nanoelectronics

Domain wall nanoelectronics

Single domain wall dynamics in thin magnetic wires

Artificial Magnetic Pattern Arrays Probed by Polarized Neutron Reflectivity

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