Inelastic neutron scattering is used to characterize spin fluctuations in the d-electron heavy fermion spinel LiV2O4. The spin relaxation rate, ΓQ, for Q=0.6 \AA−1 is 1.5(1) meV at low temperatures and increases linearly with temperature at a rate of 0.41(4) kB. There is antiferromagnetic short range order at low temperatures with a characteristic wave vector Qc=0.64(2) \AA−1 and a correlation length of 6(1) \AA . Warming shifts intensity towards lower Q so that magnetic scattering decreases monotonically with Q>0.3 \AA−1 for T>40 K. The data are compared with conventional heavy fermion systems, geometrically frustrated insulating magnets, and recent theories for LiV2O4.
@article{arxiv.cond-mat/0102414,
title = {Spin fluctuations in a magnetically frustrated metal, LiV2O4},
author = {S. -H. Lee and Y. Qiu and C. Broholm and Y. Ueda and J. J. Rush},
journal= {arXiv preprint arXiv:cond-mat/0102414},
year = {2009}
}
Comments
4 pages, 3 figs included, accepted for publication in Phys. Rev. Lett