Abstract
Antiferromagnetic interactions have been studied in compounds Mn X 2 L 2( X = Cl, Br; L = pyrazole, pyridine) which have a crystal structure containing dihalide-bridged Mn 2+ linear chains. The magnetic susceptibility of the compounds is interpreted on the basis of the antiferromagnetic Heisenberg linear-chain model with spin S = 5 2 . The intrachain interaction parameter J k of the various compounds lies in the region −(0·5–1·0)K. Results of specific heat measurements and paramagnetic line width studies agree reasonably with the susceptibility data. In addition, the ESR line width studies in the temperature region 100–300 K show that | J k | increases with decreasing temperatures. Finally an estimate of the ratio between the inter- and intrachain interaction parameters is given.
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