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Magnetic order and lattice anomalies in the J1-J2 model system VOMoO4

DOI: 10.1103/PhysRevB.71.220406 DOI Help

Authors: A. Bombardi (Diamond Light Source) , L. Chapon (ISIS) , I. Margiolaki (European Synchrotron Radiation Facility) , C. Mazzoli (European Synchrotron Radiation Facility) , S. Gonthier (Centre d’Elaboration des Matériaux et d’Etudes Structurales, CNRS) , F. Duc (Centre d’Elaboration des Matériaux et d’Etudes Structurales, CNRS) , P. Radaelli (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 71 (22)

State: Published (Approved)
Published: June 2005

Abstract: High-resolution x-ray and neutron powder-diffraction measurements were performed on polycrystalline VOMoO4. Below similar or equal to 40 K the system orders in a simple Neel antiferromagnetic state (propagation vector k=0), indicating a dominant role of the nearest-neighbor interactions. The order is three dimensional but the reduced saturated magnetic moment m of 0.41 (1) mu(B)/V4+ at 2 K indicates strongly two-dimensional character and enhanced quantum fluctuations. On cooling, there is no evidence of a reduction of the crystal symmetry. However, neutron diffraction indicates an anomalous evolution of the lattice parameters, which can be related to the onset of magnetic correlations.

Subject Areas: Physics

Instruments: NONE-No attached Diamond beamline

Added On: 16/09/2009 13:34

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