Magnetic Order and Dynamics in Stripe-Ordered La2-xSrxNiO4

Details Magnetic Order and Dynamics in Stripe-Ordered La2-xSrxNiO4 Magnetic Order and Dynamics in Stripe-Ordered La2-xSrxNiO4

2003-08-29

arxiv.org/abs/cond-mat/0308631v1

Physica B 345 (2004) 1-5

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figs. Presented at PNSXM, Venice. To appear in Physica B

Scientific paper

10.1016/j.physb.2003.11.007

We have studied magnetic correlations in several compositions of stripe-ordered La2-xSrxNiO4. In this paper we show how polarized-neutron scattering has helped uncover important features of the magnetic ordering and spin dynamics. In particular, polarization analysis has enabled us (1) to characterize a spin reorientation transition, (2) to identify anisotropy gaps in the spin excitation spectrum, and (3) to investigate an anomalous dip in the spin-wave intensity suggestive of coupling between collective spin and charge excitations.

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