Micro-Hall magnetometry studies of thermally assisted and pure quantum tunneling in single molecule magnet Mn12-acetate
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چکیده
منابع مشابه
Micro-Hall magnetometry studies of thermally assisted and pure quantum tunneling in single molecule magnet Mn12-acetate
We have studied the crossover between thermally assisted and pure quantum tunneling in single crystals of high spin (S=10) uniaxial single molecule magnet Mn12 using micro-Hall effect magnetometry. Magnetic hysteresis experiments have been used to investigate the energy levels that determine the magnetization reversal as a function of magnetic field and temperature. These experiments demonstrat...
متن کاملCrossover between thermally assisted and pure quantum tunneling in molecular magnet Mn12-acetate
The crossover between thermally assisted and pure quantum tunneling has been studied in single crystals of high spin (S = 10) uniaxial molecular magnet Mn12 using micro-Hall-effect magnetometry. Magnetic hysteresis and relaxation experiments have been used to investigate the energy levels that determine the magnetization reversal as a function of magnetic field and temperature. These experiment...
متن کاملMagnetic Quantum Tunneling in the Single-Molecule Magnet Mn12-Acetate
1Department of Physics, New York University, 4 Washington Place, New York, NY 10003, USA E-mail: [email protected] 2Department of Physics, University of Florida, Gainsville, FL 32611-8440, USA E-mail: [email protected] 3Department of Chemistry and Biochemistry and National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32606, USA 4Department of Chemistry and Biochemis...
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Magnetization measurements of a truly axial symmetry molecular nanomagnet with a spin ground state of S = 10 show resonant tunneling. This compound has the same magnetic anisotropy as but the molecules are better isolated and the crystals have less disorder and a higher symmetry. Hysteresis loop measurements at several temperatures reveal a well-resolved step fine structure which is due to leve...
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The symmetry of magnetic quantum tunneling has been studied in the prototype single molecule magnet Mn12-acetate using a micro-Hall effect magnetometer and superconducting high field vector magnet system. An average crystal fourfold symmetry is shown to be due to local molecular environments of twofold symmetry that are rotated by 90 degrees with respect to one another, confirming that disorder...
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ژورنال
عنوان ژورنال: Polyhedron
سال: 2001
ISSN: 0277-5387
DOI: 10.1016/s0277-5387(01)00676-3