Competing Spin Phases in Geometrically Frustrated Magnetic Molecules
arXiv:cond-mat/0405405 · doi:10.1103/PhysRevLett.94.017205
Abstract
We have found a class of zero-dimensional geometrically frustrated Heisenberg spin systems exhibiting anomalous behavior in an external magnetic field B similar to that occuring in geometrically frustrated planar antiferromagnetic lattices. Our calculations for both the classical and quantum isotropic Heisenberg models show the emergence of a pronounced minimum in the differential susceptibility dM/dB at B_sat/3 as the temperature T is raised from 0K for structures based on corner-sharing triangles, specifically the octahedron, cuboctahedron, and icosidodecahedron. Low temperature measurements of magnetization M versus B for the giant Keplerate magnetic molecule Mo72Fe30 (Fe(3+) ions with spin s=5/2 on the 30 vertices of an icosidodecahedron) are consistent with our calculational results. The minimum in dM/dB is due to the fact that for low temperatures when B is approx. B_sat/3 there exist two competing families of spin configurations of which one behaves magnetically 'stiff' leading to a reduction of the susceptibility.
4 pages, 5 figures, to be published in Phys. Rev. Lett
References in corpus (2)
Cited by in corpus (32)
- Atomistic spin model simulations of magnetic nanomaterials
- Effects of frustration on magnetic molecules: a survey from Olivier Kahn till today
- Magnetic Cluster Excitations
- Spin dynamics of molecular nanomagnets fully unraveled by four-dimensional inelastic neutron scattering
- Quantum hardware simulating four-dimensional inelastic neutron scattering
- Highly Frustrated Magnetic Clusters: The kagome on a sphere
- Properties of highly frustrated magnetic molecules studied by the finite-temperature Lanczos method
- Metamagnetic phase transition of the antiferromagnetic Heisenberg icosahedron
- Quantum Magnetism in Minerals
- High-Order Coupled Cluster Method Study of Frustrated and Unfrustrated Quantum Magnets in External Magnetic Fields
- Calculating the energy spectra of magnetic molecules: application of real- and spin-space symmetries
- Magnetic excitations in {Mo72Fe30}
- Giant magnetocaloric effect, magnetization plateaux and jumps of the regular Ising polyhedra
- Multiple nearest-neighbor exchange model for the frustrated magnetic molecules Mo72Fe30 and Mo72Cr30
- Large-scale numerical investigations of the antiferromagnetic Heisenberg icosidodecahedron
- Frustration effects in antiferromagnetic molecules: the cuboctahedron
- Sampling the two-dimensional density of states g(E,M) of a giant magnetic molecule using the Wang-Landau method
- Semiclassical degeneracies and ordering for highly frustrated magnets in a field
- A correlator product state study of molecular magnetism in the giant Keplerate Mo72Fe30
- Unravelling the Spin Dynamics of Molecular Nanomagnets with Four-Dimensional Inelastic Neutron Scattering
- Magnetic spectra in the tridiminished-icosahedron \{Fe\} nano-cluster by inelastic neutron scattering
- Inelastic neutron scattering study and Hubbard model description of the antiferromagnetic tetrahedral molecule Ni4Mo12
- Magnetization process of the S=1/2 Heisenberg antiferromagnet on the floret pentagonal lattice
- Quantum Dynamics in Classical Spin Baths
- Orientation-dependent stabilization of MgCrO spinel thin films
- Quantum Heisenberg antiferromagnet on low-dimensional frustrated lattices
- Long-range Ising spins models emerging from frustrated Josephson junctions arrays with topological constraints
- Frustration-induced exotic properties of magnetic molecules
- Evaluation of Exchange Interactions of the Spin Doughnut Mo_{75}V_{20}
- Evidence of Low-Energy Singlet Excited States in the Spin-1/2 Polyhedral Clusters {MoV} and {WV} with Strongly Frustrated Kagomé Networks
- Numerical Study of S=1/2 Heisenberg Antiferromagnet on the Floret Pentagonal Lattice
- Reminiscence of a magnetization plateau in a magnetization processes of toy-model triangular and tetrahedral clusters