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Magnetic transitions in dysprosium: A specific-heat study

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dc.contributor.author Jayasuriya, K.D. en_US
dc.contributor.author Campbell, S.J. en_US
dc.contributor.author Stewart, A.M. en_US
dc.date.accessioned 2014-11-19T04:45:51Z
dc.date.available 2014-11-19T04:45:51Z
dc.date.issued 1985
dc.identifier.issn 1098-0121 (print),1550-235x (online) en_US
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/4083
dc.description.abstract The magnetic transitions of the heavy rare-earth metal dysprosium have been examined by specific-heat measurements using a small single crystal (0.6782 g) and a large polycrystalline sample (43.25 g). A value for the latent heat of 39.1�1.5 J mol-1 is obtained at the discontinuous transition from ferromagnetism to helical antiferromagnetism, and a temperature hysteresis of 1.2�0.4 K is observed at this transition. The data around the continuous transition from helical antiferromagnetism to paramagnetism at the N�el temperature TN=179.90�0.18 K have been analyzed in terms of the equation & &)+B�+D�t, where t=(T-TN)/TN. Agreement to within two standard errors was obtained for the critical parameters of the single-crystal and polycrystalline data. The value of the critical exponent ? obtained from the data of the single crystal is 0.24�0.02, whereas that obtained from the data of the polycrystalline sample is 0.14�0.05. We find that the scaling law ?+=?- is valid for the dysprosium critical data. In order for the condition B+=B-, predicted by theory, to be satisfied we found it necessary to include the confluent singular term in E in our fit. The values of ? that we obtain are not close to the predictions of renormalization-group theory for magnetic systems with short-range exchange interactions. en_US
dc.publisher Physical Review B en_US
dc.title Magnetic transitions in dysprosium: A specific-heat study
dc.type Article en_US
dc.identifier.department Physics en_US


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