ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The crystal structure and magnetic properties of Co(HPO3)⋅H2O have been determined. The solid crystallizes in space group Pca21, a=8.984(2) A(ring), b=7.918(2) A(ring), c=10.139(8) A(ring), V=721.2 A(ring)3. Z=4 dcalc =2.89 g/cm3. The structure consists of layers only connected by hydrogen bonds. These layers can be viewed as formed by zigzag chains of edge-sharing Co(II)O6 octahedra interconnected by a three atom bridge (O-P-O) and a single oxygen bridge. ac magnetic susceptibility measurements show a sharp peak at Tc =(10.8±0.1) K, and are consistent with a transition from one- to two-dimensional magnetic order, in agreement with the structure. An analysis of the χT/C vs ε=(1−Tc/T) data in the critical region, for T〉Tc, using a double-logarithmic plot, yields a critical exponent γ=1.75 for 0.01〈ε〈0.1, which correspond to a two-dimensional Ising model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.346042
