LEADER 03212oam 2200505 450 001 9910484260003321 005 20210629184309.0 010 $a3-030-66026-5 024 7 $a10.1007/978-3-030-66026-0 035 $a(CKB)4100000011747046 035 $a(DE-He213)978-3-030-66026-0 035 $a(MiAaPQ)EBC6469895 035 $a(PPN)253859859 035 $a(EXLCZ)994100000011747046 100 $a20210629d2021 uy 0 101 0 $aeng 135 $aurnn|008mamaa 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aThermal stability of metastable magnetic skyrmions /$fLouise Desplat 205 $a1st ed. 2021. 210 1$aCham, Switzerland :$cSpringer,$d[2021] 210 4$d©2021 215 $a1 online resource (XIX, 152 p. 50 illus., 49 illus. in color.) 225 1 $aSpringer Theses 311 $a3-030-66025-7 327 $aIntroduction -- 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. 330 $aThe energy cost associated with modern information technologies has been increasing exponentially over time, stimulating the search for alternative information storage and processing devices. Magnetic skyrmions are solitonic nanometer-scale quasiparticles whose unique topological properties can be thought of as that of a Mobius strip. Skyrmions are envisioned as information carriers in novel information processing and storage devices with low power consumption and high information density. As such, they could contribute to solving the energy challenge. In order to be used in applications, isolated skyrmions must be thermally stable at the scale of years. In this work, their stability is studied through two main approaches: the Kramers' method in the form of Langer's theory, and the forward flux sampling method. Good agreement is found between the two methods. We find that small skyrmions possess low internal energy barriers, but are stabilized by a large activation entropy. This is a direct consequence of the existence of stable modes of deformation of the skyrmion. Additionally, frustrated exchange that arise at some transition metal interfaces leads to new collapse paths in the form of the partial nucleation of the corresponding antiparticle, as merons and antimerons. 410 0$aSpringer theses. 606 $aSkyrme model 606 $aSpintronics 606 $aFerromagnetism 615 0$aSkyrme model. 615 0$aSpintronics. 615 0$aFerromagnetism. 676 $a539.7 700 $aDesplat$b Louise$01223387 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bUtOrBLW 906 $aBOOK 912 $a9910484260003321 996 $aThermal Stability of Metastable Magnetic Skyrmions$92837885 997 $aUNINA