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1. |
Record Nr. |
UNINA9910484260003321 |
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Autore |
Desplat Louise |
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Titolo |
Thermal stability of metastable magnetic skyrmions / / Louise Desplat |
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Pubbl/distr/stampa |
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Cham, Switzerland : , : Springer, , [2021] |
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©2021 |
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ISBN |
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Edizione |
[1st ed. 2021.] |
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Descrizione fisica |
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1 online resource (XIX, 152 p. 50 illus., 49 illus. in color.) |
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Collana |
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Disciplina |
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Soggetti |
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Skyrme model |
Spintronics |
Ferromagnetism |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di contenuto |
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Introduction -- Terahertz Time-Domain Spectroscopy -- Rotatable-Polarisation Terahertz Time-Domain Spectroscopy of Anisotropic Media -- Scalable Interdigitated Photoconductive Emitters for the Electrical Modulation of Terahertz Beams With Arbitrary Linear Polarisation -- Tracking Disorder Broadening and Hysteresis in First-Order Phase Transitions via the Electromagnon Response in Improper Ferroelectrics -- High-Field Terahertz Time-Domain Spectroscopy of Single-Walled Carbon Nanotubes and CuO -- Conclusions. |
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Sommario/riassunto |
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The energy cost associated with modern information technologies has been increasing exponentially over time, stimulating the search for alternative information storage and processing devices. Magnetic skyrmions are solitonic nanometer-scale quasiparticles whose unique topological properties can be thought of as that of a Mobius strip. Skyrmions are envisioned as information carriers in novel information processing and storage devices with low power consumption and high information density. As such, they could contribute to solving the energy challenge. In order to be used in applications, isolated skyrmions must be thermally stable at the scale of years. In this work, their stability is studied through two main approaches: the Kramers' method in the form of Langer's theory, and the forward flux sampling method. Good agreement is found between the two methods. We find |
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that small skyrmions possess low internal energy barriers, but are stabilized by a large activation entropy. This is a direct consequence of the existence of stable modes of deformation of the skyrmion. Additionally, frustrated exchange that arise at some transition metal interfaces leads to new collapse paths in the form of the partial nucleation of the corresponding antiparticle, as merons and antimerons. |
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2. |
Record Nr. |
UNISA996393713703316 |
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Autore |
L'Estrange Roger, Sir, <1616-1704.> |
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Titolo |
The lawyer outlaw'd; or a brief answer to Mr. Hunts Defence of the Charter [[electronic resource] ] : With some useful remarks on the Commons proceedings in the last Parliament at Westminster. In a letter to a friend |
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Pubbl/distr/stampa |
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[London], : Printed by N.T. for the author, MDCLXXXIII. [1683] |
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Descrizione fisica |
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Soggetti |
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London (England) Charters, grants, privileges Early works to 1800 |
London (England) History 17th century Early works to 1800 |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Attribution to Roger L'Estrange and place of publication from Wing. |
1998 microfilm edition imperfect: t.p. damaged affecting imprint. |
Mss. on p. [1]. |
Reproduction of original in the British Library. |
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Sommario/riassunto |
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