Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order

M. Pregelj; A. Zorko; O. Zaharko; D. Arcon; M. Komelj; A. D. Hillier; H. Berger

doi:10.1103/PhysRevLett.109.227202

Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order

Strongly Correlated Electrons 2012-11-29 v2

Authors: M. Pregelj , A. Zorko , O. Zaharko , D. Arcon , M. Komelj , A. D. Hillier , H. Berger

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Abstract

An incommensurate elliptical helical magnetic structure in the frustrated coupled-spin-chain system FeTe2O5Br is surprisingly found to persist down to 53(3) mK (T/T_N ~ 1/200), according to neutron scattering and muon spin relaxation. In this state, finite spin fluctuations at T -> 0 are evidenced by muon depolarization, which is in agreement with specific-heat data indicating the presence of both gapless and gapped excitations. We thus show that the amplitude-modulated magnetic order intrinsically accommodates contradictory persistent spin dynamics and long-range order and can serve as a model structure to investigate their coexistence.

Keywords

spin excitations in condensed matter frustrated magnetism magnetism

Cite

@article{arxiv.1208.5843,
  title  = {Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order},
  author = {M. Pregelj and A. Zorko and O. Zaharko and D. Arcon and M. Komelj and A. D. Hillier and H. Berger},
  journal= {arXiv preprint arXiv:1208.5843},
  year   = {2012}
}

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5 pages + supplementary

Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order

Abstract

Keywords

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