Single Crystal High Frequency Cavity-based EPR Spectroscopy of Single Molecule Magnets

Abstract

We report high frequency electron paramagnetic resonance (EPR) investigations of a series of high spin (total spin up to S = 10) manganese and nickel complexes which have been shown to exhibit single molecule magnetism, including low temperature (below 1K) hysteresis loops and resonant magnetic quantum tunneling. A cavity perturbation technique enables high sensitivity oriented single crystal EPR measurements spanning a very wide frequency range (16 to 200+ GHz). Fitting of the frequency and field orientation dependence of EPR spectra allows direct determination of the effective spin Hamiltonian parameters. Studies on a range of materials with varying (approximately axial) site symmetries facilitates an assessment of the role of transverse anisotropy (terms in the Hamiltonian that do not commute with S(sub z)) in the magnetic quantum tunneling phenomenon.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADP014340

Entities

People

  • J. M. North
  • N. Aliaga
  • R. S. Edwards
  • S. I. Jones
  • Steven C. Hill

Organizations

  • University of Florida

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Crystal Structure
  • Crystals
  • Detectors
  • Electromagnetic Fields
  • Frequency
  • Ground State
  • Instrumentation
  • Low Temperature
  • Magnetic Fields
  • Magnetic Materials
  • Materials
  • Measurement
  • Orientation (Direction)
  • Quantum Tunneling
  • Single Crystals
  • Spectroscopy
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics
  • Quantum Computing
  • Quantum Science - Quantum Dots