Spin dynamics in stripe-ordered La5/3Sr1/3NiO4

A. T. Boothroyd; D. Prabhakaran; P. G. Freeman; S. J. S. Lister; M. Enderle; A. Hiess; J. Kulda

doi:10.1103/PhysRevB.67.100407

Spin dynamics in stripe-ordered La5/3Sr1/3NiO4

Strongly Correlated Electrons 2009-11-07 v1

Authors: A. T. Boothroyd , D. Prabhakaran , P. G. Freeman , S. J. S. Lister , M. Enderle , A. Hiess , J. Kulda

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Abstract

Polarized and unpolarized neutron inelastic scattering has been used to measure the spin excitations in the spin-charge-ordered stripe phase of La5/3Sr1/3NiO4. At high energies, sharp magnetic modes are observed characteristic of a static stripe lattice. The energy spectrum is described well by a linear spin wave model with intra- and inter-stripe exchange interactions between neighbouring Ni spins given by J = 15 +/- 1.5 meV and J' = 7.5 +/- 1.5 meV respectively. A pronounced broadening of the magnetic fluctuations in a band between 10 meV and 25 meV is suggestive of coupling to collective motions of the stripe domain walls.

Keywords

spin excitations in condensed matter frustrated magnetism magnetism

Cite

@article{arxiv.cond-mat/0206536,
  title  = {Spin dynamics in stripe-ordered La5/3Sr1/3NiO4},
  author = {A. T. Boothroyd and D. Prabhakaran and P. G. Freeman and S. J. S. Lister and M. Enderle and A. Hiess and J. Kulda},
  journal= {arXiv preprint arXiv:cond-mat/0206536},
  year   = {2009}
}

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ReVTeX 4, 4 pages inc. 4 Figs

Spin dynamics in stripe-ordered La5/3Sr1/3NiO4

Abstract

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