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Showing 1 to 20 of 30 for “"Magnetization Dynamics"”.
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Ultrafast magnetization dynamics
This thesis addresses ultrafast magnetization dynamics from a theoretical perspective. The manipulation of magnetization using the inverse Faraday effect has been studied, as well as magnetic relaxation processes in quantum dots. The inverse Faraday effect – the generation of a magnetic field by …
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Magnetization dynamics of single molecule magnets
Made available in DSpace on 2014-09-16T17:25:53Z (GMT). No. of bitstreams: 2 Yun_Liu.pdf: 2936489 bytes, checksum: 870b4bdf8c282c749cf14f4925088600 (MD5) license.txt: 4056 bytes, checksum: c0d6bd6324ecaf18c5d2647589f9beff (MD5)
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Magnetization Dynamics in Ultrathin Films and Multilayers
Robust understanding of magnetization dynamics is very crucial to design and fabricate novelmaterials for next generation spintronic applications. A combination of experimental techniques and theoretical modeling facilitates fundamental research to establish new concepts. This dissertation …
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Ultrafast magnetization dynamics of lanthanide metals and alloys
In this study, the laser-induced magnetization dynamics of the lanthanide ferromagnets Gadolinium (Gd), Terbium (Tb) and their alloys is investigated using femtosecond (fs) time-resolved x-ray magnetic circular dichroism (XMCD), the magneto-optical Kerr effect (MOKE) and magnetic second harmonic …
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Laser induced magnetization dynamics and switching in multilayers
Contains fulltext : 178596.pdf (Publisher’s version ) (Open Access)
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Spin-torque-driven magnetization dynamics for neuromorphic functionality
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Element-resolved ultrafast magnetization dynamics in ferromagnetic alloys and multilayers
The microscopic origin of ultrafast demagnetization, i.e. the quenching of the magnetization of a ferromagnetic metal on a sub-picosecond timescale after laser excitation, is still only incompletely understood, despite a large body of experimental and theoretical work performed since the discovery …
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Study of microwave-assisted magnetization dynamics in magnetic films and structures
Microwave-assisted magnetization reversal (MAMR) has been suggested as an alternative recording scheme to extend areal densities in hard disk drives beyond 1 Tb/in<sup>2</sup>. In this thesis, microwave-assisted magnetization dynamics have been characterized in different spatial regimes by …
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A Play of Light and Spins: Excitation and Detection of Non-linear Magnetization Dynamics using Light
The excitation and detection of magnetization dynamics play key roles in the field of spintronics and magnonics. In this thesis, we investigate a contactless method of exciting nonlinear magnetization dynamics using a femtosecond pulsed laser, and study the same with a Brillouin Light Scattering …
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A photoemission study of quasiparticle excitations, electron-correlation effects and magnetization dynamics in thin magnetic systems
… response in the precessional motion of the magnetization can be induced by means of a laser-excited photoswitch. From a comparision to micromagnetic calculations it is demonstrated that the relatively high precessional frequency observed in the experiments is directly linked to the nature of …
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TIME-DOMAIN INVESTIGATION OF ACOUSTICALLY AND THERMALLY DRIVEN MAGNONS
… in the substrate influence and drive the magnetization dynamics of the Ni thin films via magnetoelastic coupling. In a second experiment, the TG approach has been exploited to drive coherent magnons at a selected wavevector non-relying on the magnetoelastic coupling but rather on the …
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Solitons in Magnetic Systems
… (BEC) mixtures, with its main focus on the dynamics of solitary waves in such systems in conditions of broken integrability and with reference to the formal and physical analogies between BEC mixtures and the classical magnetization dynamics of solid-state ferromagnets. Chapter 2 introduces …
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Magnetic Excitations in Cylindrical Multilayered Nanostructures
… dipole-dipole interactions dominate in the SW dynamics. The magnetostatic form of Maxwell's equations and electromagnetic boundary conditions are used to derive the SW dispersion relations in nanotubes. A transfer matrix formalism is subsequently used to generalize these calculations to …
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Taking Steps Towards Superfluid-like Spin Transport in Metallic Ferromagnets
… Theoretical studies have proposed a new form of magnetization dynamics, referred to as superfluid-like spin transport, as a way to overcome this shortfall. Instead of decaying exponentially with distance, the spin current associated with superfluid-like spin transport decays linearly with …
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Current-induced torques in ferromagnets at room temperature
… over the spin-transfer torque in driving magnetization dynamics. In Chapter 5, we characterise the CITs in bulk NiMnSb induced by the relativistic spin-orbit coupling effect. Both field-like and antidamping-like spin-orbit torques are observed and analysed in detail. At the end of this …
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Study of Magnetization Switching in Coupled Magnetic Nanostructured Systems
A study of magnetization dynamics experiments in nanostructured materials using the rf susceptibility tunnel diode oscillator (TDO) method is presented along with a extensive theoretical analysis. An original, computer controlled experimental setup that measures the change in susceptibility with …
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Radio frequency miniature passive devices: ferrite antennas and inductors
… telecommunication systems. The interaction of magnetization dynamics with electromagnetic waves in the RF devices allows electromagnetic radiation, wave propagation, and RF signal processing. Ferrites possess both frequency-dependent permeability and permittivity. Thus, miniaturization and …
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Exploring relaxation of magnetization in paramagnetic molecules
Relaxation of magnetization in paramagnetic molecules consists of several distinct mechanisms that are often difficult to elucidate. The goal of this work is to explore different theoretical approaches to uncovering contributions of different mechanisms to magnetic relaxation. We demonstrated on …
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