Charge and Spin Order in La2-xSrxNiO4 (x=0.275 and 1/3)
msra(2000)
Abstract
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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Key words
neutron diffraction
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