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Title

Crystal structure and magnetism of Co(HPO3)⋅H2O: A novel layered compound of Co(II)

AuthorsGómez-Romero, P. ; Sapiña, F.; Beltrán-Porter, Daniel; Navarro, Rafael; Rillo, Conrado; Lera, F.
Issue Date1990
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 67(9): 5998-6000 (1990)
AbstractThe crystal structure and magnetic properties of Co(HPO3)⋅H2O have been determined. The solid crystallizes in space group P c a21, a=8.984(2) Å, b=7.918(2) Å, c=10.139(8) Å, V=721.2 Å3. Z=4 d calc =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 T c =(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−T c /T) data in the critical region, for T>T c , 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.
DescriptionUnder the terms of the Creative Commons Attribution (CC BY) license to their work.-- et al.
Publisher version (URL)http://dx.doi.org/10.1063/1.346042
URIhttp://hdl.handle.net/10261/129701
DOI10.1063/1.346042
Identifiersdoi: 10.1063/1.346042
issn: 0021-8979
e-issn: 1089-7550
Appears in Collections:(ICMA) Artículos
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