A specific heat study of natural haematite around the Morin transition and the effects of entrapped water

dc.contributor.author	Jayasuriya, K.D.	en_US
dc.contributor.author	Stewart, A.M.	en_US
dc.contributor.author	Campbell, S.J.	en_US
dc.date.accessioned	2014-11-19T04:45:51Z
dc.date.available	2014-11-19T04:45:51Z
dc.date.issued	1985
dc.description.abstract	The Morintransition in samples of natural haemitite has been examined by specificheat and M�ssbauer measurements. Specificheat measurements on as-received samples reveal an anomaly at ? 273.2 K and irregular behaviour at higher temperatures. However, heat treatment of samples demonstrated that these effects were due to water trapped inside the natural specimens. No anomaly due to the Morintransition was observed in the specificheat although the expected changes in the M�ssbauer hyperfine parameters were observed for the different magnetic phases below and above the Morintransition. The results are consistent with a coexistence of the two phases and a spread of temperatures ? 40 K over which the transitions take place throughout the material of purity 99.6 wt%.	en_US
dc.identifier.department	Physics	en_US
dc.identifier.issn	0022-3697	en_US
dc.identifier.uri	http://repository.kln.ac.lk/handle/123456789/4085
dc.publisher	Journal of Physics and Chemistry of Solids	en_US
dc.title	A specific heat study of natural haematite around the Morin transition and the effects of entrapped water
dc.type	Article	en_US

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