Magnetization Ratchet in Cylindrical Nanowires

Bran, Cristina; Berganza, Eider; Fernández-Roldán, José Ángel; Palmero, Ester M.; Meier, J. W. R.; Calle, E.; Jaafar, Miriam; Foerster, Michael; Aballe, Lucía; Fraile-Rodrı́guez, A.; Real, R. P. del; Asenjo, A.; Chubykalo‐Fesenko, O.; Vázquez, M.

doi:10.1021/acsnano.8b02153

Cited by 72 publications

(74 citation statements)

References 53 publications

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“…This control of magnetization processes by changing the composition is particularly interesting since it has been recently shown that changes in composition can lead to full control of magnetization processes in NWs . Even more, the introduction of local changes in the composition in NWs, in which magnetization processes are fully controlled by magnetostatic interactions, can introduce topologically protected magnetic structures, very interesting from both the theoretical and application point of view …”

mentioning

confidence: 99%

Tailoring Magnetic Anisotropy at Will in 3D Interconnected Nanowire Networks

Ruiz‐Clavijo

Ruiz-Gómez

Caballero-Calero

et al. 2019

Physica Rapid Research Ltrs

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The control of magnetic anisotropy has been the driving force for the development of magnetic applications in a wide range of technological fields from sensing to spintronics. In recent years, the possibility of tailoring the magnetic properties goes together with a need for new 3D materials to expand the applications to a new generation of devices. Herein, the possibility of designing the magnetic anisotropy of 3D magnetic nanowire networks is shown just by modifying the geometry of the structure or by composition. It is also shown that this is possible when the magnetic properties of the structure are governed by magnetostatic anisotropy. The present approach can guide systematic tuning of the magnetic easy axis and coercivity in the desired direction at the nanoscale. Importantly, this can be achieved on virtually any magnetic material, alloy, or multilayers that can be prepared inside porous alumina. These results are promising for engineering novel magnetic devices that exploit tailored magnetic anisotropy using metamaterials concept.

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mentioning

confidence: 99%

Tailoring Magnetic Anisotropy at Will in 3D Interconnected Nanowire Networks

Ruiz‐Clavijo

Ruiz-Gómez

Caballero-Calero

et al. 2019

Physica Rapid Research Ltrs

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“…This is valid for either two types of magnetic materials (Ivanov et al 2016a; Fig. 13c), or one magnetic and the other one nonmagnetic (Grutter et al 2017, Bran et al 2018. In case the segments display a transverse shape or magnetocristalline anisotropy, each may display a type of domain on its own, e.g.…”

Section: Modulated and 3d Structuresmentioning

confidence: 97%

“…The impact of an Oersted field has also been considered to assist nucleation, as the curling mode has the same symmetry as the Oersted field (Otalora et al 2015). Nucleation as a function of (short) wire length has also been investigated (Sergelius et al 2017), with application to the realization of a ratchet in multisegmented wires with an axial gradient of segment length (Bran et al 2018).…”

Section: Nucleation Of Domain Wallsmentioning

confidence: 99%

“…In magnetic/non-magnetic segments, each magnetic segment is disconnected from the next by exchange, however may be coupled through dipolar fields (Sergelius et al 2017). This has been used to propose a ratchet-type switching, i.e., unidirectional (Bran et al 2018) (Fig. 19d).…”

Section: Wall Type Stimulusmentioning

confidence: 99%

“…The Faraday geometry was demonstrated by Peng et al (2003). Single nanowires have been investigated as well (Pitzschel et al 2011, Vega et al 2012, Fernández-Pacheco et al 2013, Vilanova Vidal et al 2015, Palmero et al 2015, Staňo et al 2017b, Bran et al 2018). However, one should be careful about two aspects for wires and tubes: curved surfaces may lead to partial beam depolarization, not speaking of surface roughness.…”

Section: Magneto-opticsmentioning

confidence: 99%

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Magnetic Nanowires and Nanotubes

Staňo

Fruchart

2018

Handbook of Magnetic Materials

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We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By nano we consider diameters reasonably smaller than a micrometer. At this scale, comparable to micromagnetic and transport length scales, novel properties appear. At the same time, this makes the underlying physics easier to understand due to the limiter number of degrees of freedom involved. The three-dimensional nature and the curvature of these objects contribute also to their specific properties, compared to patterns flat elements. While the topic of nanowires and later nanotubes started now decades ago, it is nevertheless flourishing, thanks to the progress of synthesis, theory and characterization tools. These give access to ever more complex and thus functional structures, and also shifting the focus from material-type measurements of large assemblies, to single-object investigations. We first provide an overview of common fabrication methods yielding nanowires, nanotubes and structures engineered in geometry (change in diameter, shape) or material (segments, core-shell structures), shape or core-shell. We then review their magnetic properties: global measurements, magnetization states and switching, single domain wall statics and dynamics, and spin waves. For each aspect, both theory and experiments are surveyed. We also mention standard characterization techniques useful for these. We finally mention emerging applications of magnetic nanowires and nanotubes, along with the foreseen perspectives in the topic.

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New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

et al. 2021

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condensed matter physics, including cell membranes, [1] nematic crystals, [2,3] superfluids, [4] semiconductors, [5][6][7][8] ferromagnets, [9] and superconductors. [10,11] Currently, much attention is paid to strongly correlated electronic systems, for example, ferromagnets and superconductors, as they provide a unique tool to manipulate the topology of coexisting vector and scalar fields, associated with geometries of conventional systems.Until recently, in the case of magnetism, the influence of the geometry on the spin vector fields was addressed primarily by the design of the sample boundaries. This approach naturally brings the shape anisotropy to the system and leads to the formation of specific spin textures, for example, magnetic vortices [12] and antivortices [13] as well as provides control over the dynamics of the topologically nontrivial magnetic solitons. [14][15][16][17][18] This discussion also tackles the state of the art in modern experimental antiferromagnetism, where the design of the sample topography and boundaries allows to control the domain wall states. [19][20][21][22] With the development of novel fabrication techniques allowing to realize complex 3D architectures, not only the boundary effects but also the extrinsic geometrical properties (e.g., local curvatures) can be addressed rigorously for the case of ferromagnets [23][24][25][26][27] as well as superconductors. [28][29][30] The explored effects are directly related to the interplay between the Traditionally, the primary field, where curvature has been at the heart of research, is the theory of general relativity. In recent studies, however, the impact of curvilinear geometry enters various disciplines, ranging from solid-state physics over soft-matter physics, chemistry, and biology to mathematics, giving rise to a plethora of emerging domains such as curvilinear nematics, curvilinear studies of cell biology, curvilinear semiconductors, superfluidity, optics, 2D van der Waals materials, plasmonics, magnetism, and superconductivity. Here, the state of the art is summarized and prospects for future research in curvilinear solid-state systems exhibiting such fundamental cooperative phenomena as ferromagnetism, antiferromagnetism, and superconductivity are outlined. Highlighting the recent developments and current challenges in theory, fabrication, and characterization of curvilinear micro-and nanostructures, special attention is paid to perspective research directions entailing new physics and to their strong application potential. Overall, the perspective is aimed at crossing the boundaries between the magnetism and superconductivity communities and drawing attention to the conceptual aspects of how extension of structures into the third dimension and curvilinear geometry can modify existing and aid launching novel functionalities. In addition, the perspective should stimulate the development and dissemination of research and development oriented techniques to facilitate rapid transitions from laboratory demonstrations to industry-...

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Magnetization Ratchet in Cylindrical Nanowires

Cited by 72 publications

References 53 publications

Tailoring Magnetic Anisotropy at Will in 3D Interconnected Nanowire Networks

Tailoring Magnetic Anisotropy at Will in 3D Interconnected Nanowire Networks

Magnetic Nanowires and Nanotubes

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

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