Magnetic excitations in S = 2 quasi-one-dimensional Heisenberg antiferromagnets
Haldane's conjecture of a spin-gap in the magnetic excitation spectrum for one-dimensional integer spin Heisenberg antiferromagnets, has during recent years increased the interest in well-suited materials with S = 2, since the proposed gap still remains elusive for such systems. We have synthesized a series of S = 2 quasi-one-dimensional Heisenberg antiferromagnets, and through chemical manipulations optimized the structure of these, in order to make them as promising candidates as possible for the observation of the Haldane gap. Furthermore, preliminary inelastic neutron scattering data have revealed the presence of several magnetic excitations in one member of the series, and we wish to clarify the nature of these by studying the members of the series that set the outer limits in terms of intrachain magnetic exchange interaction and interchain separation.
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Mikkel A. Sørensen; BENDIX Jesper; HANSEN Ursula Bengaard; LEFMANN Kim and MUTKA Hannu. (2014). Magnetic excitations in S = 2 quasi-one-dimensional Heisenberg antiferromagnets. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1395
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