Magnetization dynamics in the single-molecule magnet Fe8 under pulsed microwave irradiation

Abstract

We present measurements on the single molecule magnet Fe8 in the presence of pulsed microwave radiation at 118 GHz. The spin dynamics is studied via time resolved magnetization experiments using a Hall probe magnetometer. We investigate the relaxation behavior of magnetization after the microwave pulse. The analysis of the experimental data is performed in terms of different contributions to the magnetization after-pulse relaxation. We find that the phonon bottleneck with a characteristic relaxation time of 10 to 100 ms strongly affects the magnetization dynamics. In addition, the spatial effect of spin diffusion is evidenced by using samples of different sizes and different ways of the sample's irradiation with microwaves.

14 pages, 12 figures

References in corpus (14)

• Quantum Computing in Molecular Magnets
• Butterfly hysteresis loop and dissipative spin reversal in the S=1/2, V15 molecular complex
• Nonadiabatic Landau Zener tunneling in Fe_8 molecular nanomagnets
• Detailed single crystal EPR lineshape measurements for the single molecule magnets Fe8Br and Mn12-ac
• Quantum phase interference (Berry phase) in single-molecule magnets of Mn12
• Landau Zener method to study quantum phase interference of Fe8 molecular nanomagnets
• Quantum Coherence between High Spin Superposition States of Single Molecule Magnet Ni${}_4$
• Photon-assisted tunneling in a Fe8 Single-Molecule Magnet
• Role of dipolar and exchange interactions in the positions and widths of EPR transitions for the single-molecule magnets Fe8 and Mn12
• Resonant photon absorption in the low spin molecule V15
• Characterization of the S = 9 excited state in Fe8Br8 by Electron Paramagnetic Resonance
• Photon-Induced Magnetization Reversal in Single-Molecule Magnets
• Resonant photon absorption and hole burning in Cr7Ni antiferromagnetic rings
• Non-equilibrium Magnetization Dynamics in the Fe_8 Single-Molecule Magnet Induced by High-Intensity Microwave Radiation

Cited by in corpus (9)

• Single-molecule Nanomagnets
• Pump-Probe Experiments on the Single-Molecule Magnet Fe8 : Measurement of Excited Level Lifetimes
• Influence of antisymmetric exchange interaction on quantum tunneling of magnetization in a dimeric molecular magnet Mn6
• Radiation- and Phonon-Bottleneck-Induced Tunneling in the Fe8 Single-Molecule Magnet
• Tuning Magnetic Avalanches in Mn12-ac
• Magnetization relaxation in the single molecule magnet Ni${}_4$ under continuous microwave irradiation
• Energy Level Lifetimes in the Single-Molecule Magnet Fe_8 : Experiments and Simulations
• Electromagnetic radiation emanating from the molecular nanomagnet Fe8
• On-chip Integration of High-Frequency Electron Paramagnetic Resonance Spectroscopy and Hall-Effect Magnetometry