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Thermal stability of metastable magn...
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Desplat, Louise.
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Thermal stability of metastable magnetic skyrmions
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Thermal stability of metastable magnetic skyrmions/ by Louise Desplat.
作者:
Desplat, Louise.
出版者:
Cham :Springer International Publishing : : 2021.,
面頁冊數:
xix, 152 p. :ill., digital ;24 cm.
內容註:
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.
Contained By:
Springer Nature eBook
標題:
Skyrme model. -
電子資源:
https://doi.org/10.1007/978-3-030-66026-0
ISBN:
9783030660260
Thermal stability of metastable magnetic skyrmions
Desplat, Louise.
Thermal stability of metastable magnetic skyrmions
[electronic resource] /by Louise Desplat. - Cham :Springer International Publishing :2021. - xix, 152 p. :ill., digital ;24 cm. - Springer theses,2190-5053. - Springer theses..
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.
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 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.
ISBN: 9783030660260
Standard No.: 10.1007/978-3-030-66026-0doiSubjects--Topical Terms:
2158092
Skyrme model.
LC Class. No.: QC793.3.S8 / D47 2021
Dewey Class. No.: 539.74
Thermal stability of metastable magnetic skyrmions
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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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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 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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