Direct estimation of zero-field energy gap in the nano-scale single molecular magnet V15

The electron spin resonance (ESR) at low frequency (0.6-3GHz) and at low temperature (0.5K) was performed for the single molecular magnet V15. Non-linear field dependence of resonance at the lowest temperature implies the existence of the zero-field gap. The angle dependence of resonance field has s...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2007-03, Vol.310 (2), p.1203-1205
Main Authors: KAJIYOSHI, K, KAMBE, T, MINO, M, NOJIRI, H, KÖGERLER, P, LUBAN, M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron paramagnetic resonance and relaxation
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Molecular magnets
Physics
Studies of specific magnetic materials
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Summary:The electron spin resonance (ESR) at low frequency (0.6-3GHz) and at low temperature (0.5K) was performed for the single molecular magnet V15. Non-linear field dependence of resonance at the lowest temperature implies the existence of the zero-field gap. The angle dependence of resonance field has strong anisotropy. We directly estimate the zero-field energy gap of 30mK and analyze the energy levels using the model with Dzyaloshinskii-Moriya interaction.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.10.313