Spin reorientation transition in the incommensurate stripe-ordered phase of La3/2Sr1/2NiO4

Abstract

The spin ordering of La3/2Sr1/2NiO4 was investigated by magnetization measurements, and by unpolarized- and polarized-neutron diffraction. Spin ordering with an incommensurability epsilon ~ 0.445 is observed below T_so ~ 80 K. On cooling, a spin reorientation is observed at 57 +/- 1 K, with the spin axes rotating from 52 +/- 4 degrees to 78 +/- 3 degrees. This is the first time a spin reorientation has been observed in a La2-xSrxNiO4+delta compound having incommensurate stripe order.

arXiv commentREVTex 4. 4 pages including 4 figures. Minor changes to text. Accepted to be published in Physical Review B

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• Spin Dynamics of Half-Doped La3/2Sr1/2NiO4
• Magnetization of La(2-x)Sr(x)NiO(4+ delta) (0 < x < 0.5) and observation of novel memory effects
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• Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d
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• Interdependent scaling of long-range oxygen and magnetic ordering in non-stoichiometric Nd${}_2$NiO${}_{4.10}$
• Magnetic excitations in La${}_{1.5}$Sr${}_{0.5}$CoO${}_4$
• Jahn-Teller mechanism of stripe formation in doped layered La${}_{2-x}$Sr${}_x$NiO${}_4$ nickelates
• Magnetization of Charge-ordered la(2-x)sr(x)nio(4+delta)