Spin-singlet ground state with energy gaps in: Neutron-scattering, magnetic-susceptibility, and ESR measurements
- 1 August 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 56 (6), 3231-3238
- https://doi.org/10.1103/physrevb.56.3231
Abstract
Magnetic properties of powder were studied by neutron-scattering, magnetic-susceptibility, and electron-spin-resonance (ESR) measurements. It has been proved that this cuprate has a spin-singlet ground state separated from the excited states by finite-energy gaps. The spin susceptibility and the ESR integrated intensity show a broad maximum around 100 K followed by a rapid decrease to zero with decreasing temperature. The neutron-scattering measurements clearly exhibit magnetic excitations around 14.4 and 17.9 meV. The excitation energies are nearly temperature and independent, but the intensity of the excitations does decrease with increasing temperature. The experimental results are consistent with a model of a four-spin chain with alternating exchange interactions. The two exchange interactions are K (ferromagnetic) and K (antiferromagnetic).
Keywords
This publication has 15 references indexed in Scilit:
- Magnetic Susceptibility of Quasi-One-Dimensional Compoundα'-NaV2O5–Possible Spin-Peierls Compound with High Critical Temperature of 34 K–Journal of the Physics Society Japan, 1996
- Neutron-Scattering Study of Magnetic Excitation in Six-Spin-Ring System Cu3WO6Journal of the Physics Society Japan, 1996
- Pressure-induced critical behavior ofclose to=3.1 GPa: X-ray diffraction resultsPhysical Review B, 1996
- Spin-singlet ground state with energy gap in Cu3WO6: A new kind of an RVB state?Physica B: Condensed Matter, 1995
- Discovery of a spin-singlet ground state with an energy gap inPhysical Review B, 1995
- Observation of a Spin Gap in SrComprising Spin-½ Quasi-1D Two-Leg LaddersPhysical Review Letters, 1994
- Inelastic Neutron Scattering from the Spin Ladder CompoundPhysical Review Letters, 1994
- Observation of the spin-Peierls transition in linear(spin-1/2) chains in an inorganic compoundPhysical Review Letters, 1993
- Magnetic susceptibility of (VO: A one-dimensional spin-1/2 Heisenberg antiferromagnet with a ladder spin configuration and a singlet ground statePhysical Review B, 1987
- Direct observation of singlet-triplet separation in dimeric copper(II) acetate by neutron inelastic scattering spectroscopyInorganic Chemistry, 1979