Charge and Spin Order in La2-xSrxNiO4 (x=0.275 and 1/3)

Details Charge and Spin Order in La2-xSrxNiO4 (x=0.275 and 1/3) Charge and Spin Order in La2-xSrxNiO4 (x=0.275 and 1/3)

2000-02-22

arxiv.org/abs/cond-mat/0002348v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures, submitted to phys. rev. lett

Scientific paper

We report polarized and unpolarized neutron diffraction measurements on La2-xSrxNiO4 (x=0.275 and 1/3). The data for the spin ordered states are consistent with a collinear spin model in which spins with S=1 are in the NiO2 plane and are uniformly rotated from the charge and spin stripe direction. The deviation angle is larger for x=1/3 than for x=0.275. Furthermore, for x=1/3, the ordered spins reorient below 50 K, which suggests a further lock-in of the doped holes and their magnetic interactions with the S=1 spins.

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