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By making use of the recently measured spin-wave dispersion relations we have calculated the spin-wave contributions to the low-temperature specific heats of antiferromagnetic MnF 2 , FeF 2 , CoF 2 and NiF 2 from 0 to 50 °K (0 to 35 °K for CoF 2 ) using two different numerical methods. The results are compared with the experimental measurements of Stout and Catalano for temperatures of 15 °K and above; it is suggested that further experimental measurements below 15 °K would be worth while.
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Begum et al. (1969) studied this question.
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