ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Single-crystal susceptibility and magnetization data have been obtained for this unusual Cu(II) metamagnet. The structure has also been determined and is monoclinic, P21/c, with two magnetic ions per unit cell. Structural details strongly suggest an effective lattice dimensionality of two. This is confirmed by the failure of the high-temperature susceptibility to conform to a Curie–Weiss law, and by an excellent fit to the susceptibility data using a high-temperature series expansion for the square-planar, S=1/2, Heisenberg model, with g=2.144 and J/k=20.1 K. The single-crystal susceptibility is markedly anisotropic below the approximately 9.55-K Néel temperature, and is also somewhat anisotropic above it. Metamagnetic transitions are clearly observed along the b easy axis, the transition field being quite small (Hc≈31 G near 0 K) and decreasing with increasing temperature. The interlayer antiferromagnetic exchange is estimated to be only about 0.0094 K.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.338887
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