2005/08/31 by Mustafa Bal, M. Bal, Jonathan R. Friedman +11 · 1 citation
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #Atomic physics #Condensed matter physics #Electron Spin Resonance Studies #Lanthanide and Transition Metal Complexes #Magnet #Magnetic field #Magnetism in coordination complexes #Magnetization #Magnetization dynamics #Materials science #Microsecond #Microwave #Nuclear magnetic resonance #Optics #Photon #Physics #Radiation #Relaxation (psychology) #Spin (aerodynamics) #Thermodynamics #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.2173219
6 RevTeX pages, including 8 eps figures. Revision: Simulations added to paper. Version accepted by J. Appl. Phys. (MMM'05 conference proceedings)
arxiv created 2006/01/04 · openalex publication_date 2006/04/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Microwave radiation applied to single-molecule magnets can induce large magnetization changes when the radiation is resonant with transitions between spin levels. These changes are interpreted as due to resonant heating of the sample by the microwaves. Pulsed-radiation studies show that the magnetization continues to decrease after the radiation has been turned off with a rate that is consistent with the spin’s characteristic relaxation rate. The measured rate increases with pulse duration and microwave power, indicating that greater absorbed radiation energy results in a higher sample temperature. We also performed numerical simulations that qualitatively reproduce many of the experimental results. Our results indicate that experiments aimed at measuring the magnetization dynamics between two levels resonant with the radiation must be done much faster than the ⩾20μs time scales probed in these experiments.