Author:
Freeman P. G.,Giblin S. R.,Skoulatos M.,Mole R. A.,Prabhakaran D.
Abstract
Abstract
We report on the magnetism of charge-stripe ordered La2NiO4.11±0.01 by neutron scattering and μSR. On going towards zero energy transfer there is an observed wave vector offset in the centring of the magnetic excitations and magnetic Bragg reflections, meaning the excitations cannot be described as Goldstone modes of the magnetic order. Weak transverse field μSR measurements determine the magnetically order volume fraction is 87% from the two stripe twins, and the temperature evolution of the magnetic excitations is consistent with the low energy excitations coming from the magnetically ordered volume of the material. We will discuss how these results contrast with the proposed origin of a similar wave vector offset recently observed in a La-based cuprate, and possible origins of this effect in La2NiO4.11.
Publisher
Springer Science and Business Media LLC
Reference35 articles.
1. Tranquada, J. M., Sternleib, B. J., Axe, J. D., Nakamura, Y. & Uchida, S. Evidence for stripe correlations of spins and holes in copper oxide superconductors. Nature (London) 375, 561 (1995).
2. Hayden, S. M., Mook, H. A., Dai, P., Perring, T. G. & Doan, F. The structure of the high-energy spin excitations in a high-transition-temperature superconductor. Nature (London) 429, 531 (2004).
3. Tranquada, J. M. et al. Quantum magnetic excitations from stripes in copper oxide superconductors. Nature (London) 429, 534 (2004).
4. Woo, H. et al. Mapping spin-wave dispersions in stripe-ordered La2NiO4 (x = 0.275, 0.333). Phys. Rev. B 72, 064437 (2005).
5. Boothroyd, A. T., Babkevich, P., Prabhakaran, D. & Freeman, P. G. An hour-glass magnetic spectrum in an insulating, hole-doped antiferromagnet. Nature (London) 375, 561 (2011).
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