Modified Spin-Wave Theory for Nanomagnets : Application to the Keplerate Molecule Mo_<72>Fe_<30>(Nanometer-Scale Magnets, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

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概要

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• We adapt Takahashi's modified spin-wave theory to the context of nano-magnets, and apply it to the molecular compound based on the giant magnetic molecule Mo_<72>Fe_<30>. This involves solving numerically the mean-field equations and then forcing the sublattice magnetizations to zero by means of local chemical potentials for the magnons. We have thus constructed a quantum state with no local magnetization at all temperatures, appropriate to a finite-size system, but with strong correlations. We compare theoretical results to specific heat and ESR measurements.

• 理論物理学刊行会の論文
• 2005-10-31

著者

• Cepas Olivier

  Institut Anue Langevin:department Of Physics University Of Queensland

• Cepas Olivier

  Institut Laue Langevin

• ZIMAN Timothy

  Institut Lane Langevin

• Ziman Timothy

  Institut Laue Langevin

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• Modified Spin-Wave Theory for Nanomagnets : Application to the Keplerate Molecule Mo_Fe_(Nanometer-Scale Magnets, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
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