Abstract
Abstract
We report the crystal growth and structural and magnetic properties of quasi-two-dimensional
quantum magnet Cu[C6H2(COO)4][H3N-(CH2)2-NH3]
3H2O. It is found to crystallize in a monoclinic structure with space group
. The CuO4 plaquettes are connected into a two-dimensional framework in the ab-plane through the anions of [C6H2(COO)4]4− (pyromellitic acid). The [H3N-(CH2)2-NH3]
3H2O groups are located between the layers and provide a weak interlayer connection via hydrogen (H...O) bonds. The temperature-dependent magnetic susceptibility is well described by
frustrated square lattice
model with nearest-neighbor interaction
and next-nearest-neighbor interaction
. Our analysis using frustrated rectangular lattice
model also confirms almost isotropic nearest-neighbour interactions (
and
) in the ab-plane and
. Further, the isothermal magnetization at
is also well described by a non-frustrated square lattice model with
. Based on the
ratio, the compound can be placed in the Néel antiferromagnetic state of the
phase diagram. No signature of magnetic long-range order is detected down to 2 K.
Subject
General Physics and Astronomy
Cited by
2 articles.
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