Abstract
We have synthesized Sr 2PrO 4, an orthorhombic oxide (S.G. Pbam), which presents a 1D-framework of edge sharing [PrO 6] octahedra forming chains along the crystallographic c-axis. These chains containing Pr 4+ f 1 ion are far from each other and only connected through non-magnetic [SrO 6] trigonal prisms. Magnetic susceptibility measurements using a SQUID magnetometer in the temperature range from RT down to 1.7 K show a net maximum at 3.4 K. We performed neutron powder diffraction experiments collecting patterns at temperatures below and above that of the χ maximum and the data do not show any evidence of magnetic order, which is in contradiction with the apparent feature of bulk measurements. This anomalous behaviour could be due to the low-dimensional nature of the magnetic interactions or by a strong reduction of the rare earth magnetic moment due to the crystal field.
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