publication . Preprint . 2001

Detailed single crystal EPR lineshape measurements for the single molecule magnets Fe8Br and Mn12-ac

Hill, S.; Maccagnano, S.; Park, K.; Achey, R. M.; North, J. M.; Dalal, N. S.;
Open Access English
  • Published: 10 Dec 2001
Abstract
It is shown that our multi-high-frequency (40-200 GHz) resonant cavity technique yields distortion-free high field EPR spectra for single crystal samples of the uniaxial and biaxial spin S = 10 single molecule magnets (SMMs) [Mn12O12(CH3COO)16(H2O)4].2CH3COOH.4H2O and [Fe8O2(OH)12(tacn)6]Br8.9H2O. The observed lineshapes exhibit a pronounced dependence on temperature, magnetic field, and the spin quantum numbers (Ms values) associated with the levels involved in the transitions. Measurements at many frequencies allow us to separate various contributions to the EPR linewidths, including significant D-strain, g-strain and broadening due to the random dipolar field...
Subjects
free text keywords: Condensed Matter - Mesoscale and Nanoscale Physics
Related Organizations
Funded by
NSF| Acquisition of a Micro-Calorimeter Configured with a 10 T Split-Coil Magnet
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0196430
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Materials Research
,
NSF| NSE/NIRT: Quantum Effects in Single Molecule Magnets
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0103290
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Materials Research
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