E-band excitations in the magnetic Keplerate molecule Fe30

Abstract

The low-temperature excitations in the magnetic Keplerate molecule Fe30 as calculated by linear spin-wave theory (SWT), modified linear SWT, and spin-level mean-field theory (SLMFT) are compared to the recent inelastic neutron scattering results by Garlea et al. [Phys. Rev. B 73, 024414 (2006)]. SLMFT reproduces a part of the experimental spectrum rather well, but not all of it. SWTs yield a fraction of the E-band excitations and hence are not capable of a complete description of the excitation spectrum.

5 pages, 2 figures, REVTEX4, to appear in PRB

References in corpus (10)

• Exact spectra, spin susceptibilities and order parameter of the quantum Heisenberg antiferromagnet on the triangular lattice
• Rotational modes in molecular magnets with antiferromagnetic Heisenberg exchange
• Flat spin wave dispersion in a triangular antiferromagnet
• Elementary excitations in the cyclic molecular nanomagnet Cr8
• Quantum rotational band model for the Heisenberg molecular magnet Mo72Fe30
• Magnetic excitations in {Mo72Fe30}
• Frustration effects in magnetic molecules
• Q-dependence of the inelastic neutron scattering cross section for molecular spin clusters with high molecular symmetry
• Modified Spin-Wave Theory for Nanomagnets : Application to the Keplerate Molecule Mo(72)Fe(30)
• Quantum tunneling of the Neel vector in antiferromagnetic [3 x 3] grid molecules

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• Spin Rotation Technique for Non-Collinear Magnetic Systems: Application to the Generalized Villain Model
• Numerically exact and approximate determination of energy eigenvalues for antiferromagnetic molecules using irreducible tensor operators and general point-group symmetries
• Discrete antiferromagnetic spin-wave excitations in the giant ferric wheel Fe18
• The even-odd effect in short antiferromagnetic Heisenberg chains
• Large-scale numerical investigations of the antiferromagnetic Heisenberg icosidodecahedron
• Quantized antiferromagnetic spin waves in the molecular Heisenberg ring CsFe${}_8$
• Standing Spin Waves in an Antiferromagnetic Molecular Cr6 Horseshoe
• Ground States of Heisenberg Spin Clusters from Projected Hartree-Fock Theory
• Symmetry-Induced Universal Momentum-Transfer Dependencies for Inelastic Neutron Scattering on Anisotropic Spin Clusters
• Thermodynamics and spin mapping of quantum excitations in a Heisenberg spin heptamer
• Thermal features of Heisenberg antiferromagnets on edge- versus corner-sharing triangular-based lattices: A message from spin waves