High field magnetisation of the frustrated one dimensional quantum antiferromagnet LiCuVO4

We have investigated the high field magnetisation of the frustrated one dimensional compound LiCuVO4. In zero field, LiCuVO4 undergoes long range antiferromagnetic order at T_{N} ~ 2.5 K with a broad short range Schottky type anomaly due to one dimensional correlations in the specific heat at 32 K....

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2006-08
Main Authors: Banks, M G, Heidrich-Meisner, F, Honecker, A, Rakoto, H, J -M Broto, Kremer, R K
Format: Article
Language:English
Subjects:
Antiferromagnetism
Inelastic scattering
Long range order
Magnetic fields
Magnetism
Magnetization
Neutron diffraction
Neutron scattering
Neutrons
Phase diagrams
Spin structure
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have investigated the high field magnetisation of the frustrated one dimensional compound LiCuVO4. In zero field, LiCuVO4 undergoes long range antiferromagnetic order at T_{N} ~ 2.5 K with a broad short range Schottky type anomaly due to one dimensional correlations in the specific heat at 32 K. Application of a magnetic field induces a rich phase diagram. An anomaly in the derivative of the magnetisation with respect to the applied magnetic field is seen at ~ 7.5 T with H ll c in the long range order phase. We investigated this in terms of a first experimental evidence of a middle field cusp singularity (MFCS). Our numerical DMRG results show that in the parameter range of LiCuVO4 as deduced by inelastic neutron scattering (INS), there exists no MFCS. The anomaly in the derivative of the magnetisation at ~ 7.5 T is therfore assigned to a change in the spin structure from the ab plane helix seen in zero field neutron diffraction.
ISSN:2331-8422
DOI:10.48550/arxiv.0608554