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1 | (12) |
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10 | (3) |
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13 | (14) |
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2.1 Phenomenological Description |
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13 | (14) |
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2.1.1 Magnetization Dynamics at Various Time Scales |
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18 | (1) |
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2.1.2 Optically Induced Ultrafast Spin Dynamics |
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19 | (3) |
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2.1.3 Landau--Lifshitz--Gilbert (LLG) Equation |
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22 | (2) |
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24 | (3) |
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27 | (20) |
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3.1 Intrinsic Contribution |
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28 | (3) |
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3.1.1 Spin--Orbit Coupling |
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29 | (1) |
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3.1.2 Phonon-Drag Mechanism |
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29 | (1) |
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3.1.3 Eddy-Current Mechanism |
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30 | (1) |
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3.2 Extrinsic Contribution |
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31 | (7) |
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3.2.1 Two-Magnon Scattering |
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32 | (6) |
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3.2.2 Magnetic Inhomogeneity |
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38 | (1) |
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3.3 Theoretical Model for Damping |
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38 | (9) |
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3.3.1 s-d-Exchange Relaxation |
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38 | (5) |
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3.3.2 Fermi Surface Breathing |
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43 | (1) |
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44 | (3) |
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4 Experimental Techniques to Investigate Spin Dynamics |
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47 | (36) |
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4.1 Time-Resolved Magneto-Optical Kerr Effect (TR-MOKE) |
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48 | (8) |
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4.1.1 Basics and Background |
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48 | (4) |
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4.1.2 All-Optical TR-MOKE Microscope |
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52 | (1) |
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4.1.3 Benchtop TR-MOKE Setup |
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53 | (2) |
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4.1.4 Time-Resolved Scanning Kerr Microscope |
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55 | (1) |
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4.2 Brillouin Light Scattering (BLS) |
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56 | (12) |
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57 | (3) |
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60 | (6) |
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66 | (2) |
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4.3 Ferromagnetic Resonance (FMR) |
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68 | (9) |
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69 | (1) |
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4.3.2 Cavity-Based Ferromagnetic Resonance |
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70 | (2) |
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4.3.3 Broadband Ferromagnetic Resonance |
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72 | (5) |
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4.4 Advantage and Disadvantage of Various Methods |
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77 | (6) |
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78 | (5) |
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5 Factors Affecting Spin Dynamics |
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83 | (18) |
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84 | (6) |
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5.2 Interfacial Condition |
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90 | (2) |
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5.3 Shape, Size, and Pattern |
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92 | (4) |
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96 | (5) |
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97 | (4) |
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6 Electrical and Optical Control of Spin Dynamics |
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101 | (26) |
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6.1 Spin Dynamics Triggered by Electrical Current |
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102 | (1) |
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103 | (6) |
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6.3 Current-Induced Spin--Orbit Torque |
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109 | (3) |
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6.4 Optical Control of Spin Dynamics |
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112 | (15) |
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6.4.1 Coherent Control of Precessional Dynamics by Magnetic Field Pulse Shaping |
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112 | (2) |
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6.4.2 Non-Thermal Excitation and Coherent Control of the Spin Dynamics in Magnets by Inverse Faraday Effect |
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114 | (4) |
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6.4.3 All-Optical Control of Ferromagnetic Thin Films and Nanostructures |
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118 | (3) |
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121 | (6) |
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7 Tunable Magnetic Damping in Ferromagnetic/Non-magnetic Bilayer Films |
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127 | (26) |
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7.1 Static Control of Damping |
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127 | (19) |
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128 | (2) |
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7.1.2 Interfacial d-d Hybridization |
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130 | (2) |
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7.1.3 Exemplary Description of Damping Studies in Co and NiFe Layer with Pt or Au Overlayer |
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132 | (5) |
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7.1.4 Local Modification of Interface Using Focused Ion Beam in NiFe/Pt, NiFe/Cr, and NiFe/Au |
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137 | (9) |
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7.2 Dynamic Control of Damping |
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146 | (7) |
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7.2.1 Spin Hall Effect Induced Modulation of Damping in Pt/NiFe and W/CoFeB |
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147 | (2) |
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7.2.2 Spin Hall Angle Estimation of Pt and W |
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149 | (1) |
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150 | (3) |
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8 Summary and Future Direction |
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153 | |
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155 | |
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