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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Ferromagnetic exchange coupling in sodium biscarbonatocuprate(II) trihydrate

AK Gregson, NT Moxon, RR Weller and WE Hatfield

Australian Journal of Chemistry 35(8) 1537 - 1541
Published: 1982

Abstract

The magnetic properties of sodium biscarbonatocuprate(II) trihydrate, Na2Cu(CO2)2,3H2O, have been measured in the temperature range 1.8-42 K. Magnetic susceptibility and magnetization measurements provide evidence for ferromagnetic interactions in this linear-chain compound. The magnetic susceptibility data are compatible with a Heisenberg linear chain; the best-fit parameters for the complete data set are: J 1.22 ±0.04cm-1, g 2.18 ± 0.01, and zJ'-0.28 ± 0.02cm-l. Data in the temperature range 7-42K yield the best-fit parameters J1.37 ± 0.08 cm-1, g 2.12 ± 0.01, and zJ' 0.0 cm-1. The g value from this fit agrees with the g value of 2.10 obtained from a fit of the data in the temperature range 10-42 K to the Curie-Weiss law.

https://doi.org/10.1071/CH9821537

© CSIRO 1982

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