Heat capacity of MnAs0.88P0.12 from 10 to 500 K: Thermodynamic properties and transitions
dc.contributor.author | Labban, Abdul K. | en_US |
dc.contributor.author | Westrum, Jr. , Edgar F. | en_US |
dc.contributor.author | Fjellvag, Helmer | en_US |
dc.contributor.author | Gronvold, Fredrik | en_US |
dc.contributor.author | Kjekshus, Arne | en_US |
dc.contributor.author | Stolen, Svein | en_US |
dc.date.accessioned | 2006-04-07T19:47:42Z | |
dc.date.available | 2006-04-07T19:47:42Z | |
dc.date.issued | 1987-10 | en_US |
dc.identifier.citation | Labban, Abdul K., Westrum, Jr., Edgar F., Fjellvag, Helmer, Gronvold, Fredrik, Kjekshus, Arne, Stolen, Svein (1987/10)."Heat capacity of MnAs0.88P0.12 from 10 to 500 K: Thermodynamic properties and transitions." Journal of Solid State Chemistry 70(2): 185-198. <http://hdl.handle.net/2027.42/26552> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6WM2-4B6NS9R-KP/2/1abb1b9284744acb0e78709e561f082f | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/26552 | |
dc.description.abstract | The heat capacity of MnAs0.88P0.12 has been measured by adiabatic shield calorimetry from 10 to 500 K. It is shown that very small energy changes are connected with two magnetic order-order transitions, indicating that these can be regarded as mainly "noncoupled" magnetic transitions. At higher temperatures contributions to the excess heat capacity arises from a magnetic order-disorder transition, a conversion from low- to high-spin state for manganese, and a MnP- to NiAs-type structural transition. The observed heat capacity is resolved into contributions from the different physical phenomena, and the character of the transitions is discussed. In particular it is substantiated that the dilational contribution, which includes magnetoelastic and magnetovolume terms as well as normal anharmonicity terms, plays a major role in MnAs0.88P0.12. The entropy of the magnetic order-disorder transition is smaller than should be expected from a complete randomization of the spins, assuming a purely magnetic transition. Thermodynamic functions have been evaluated and the respective values of Cp, {SOm(T) - SOm(0)}, and -{GOm(T) - HOm(0)}/T at 298.15 K are 68.74, 72.09, and 32.30 J K-1 mole-1, and at 500 K 56.05, 108.12, and 56.64 J K-1 mole-1. | en_US |
dc.format.extent | 1024963 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Heat capacity of MnAs0.88P0.12 from 10 to 500 K: Thermodynamic properties and transitions | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Materials Science and Engineering | en_US |
dc.subject.hlbsecondlevel | Chemistry | en_US |
dc.subject.hlbsecondlevel | Chemical Engineering | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109 | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109 | en_US |
dc.contributor.affiliationother | Department of Chemistry, University of Oslo, Blindern, N-0315 Oslo 3, Norway. | en_US |
dc.contributor.affiliationother | Department of Chemistry, University of Oslo, Blindern, N-0315 Oslo 3, Norway. | en_US |
dc.contributor.affiliationother | Department of Chemistry, University of Oslo, Blindern, N-0315 Oslo 3, Norway. | en_US |
dc.contributor.affiliationother | Department of Chemistry, University of Oslo, Blindern, N-0315 Oslo 3, Norway. | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/26552/1/0000091.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0022-4596(87)90055-7 | en_US |
dc.identifier.source | Journal of Solid State Chemistry | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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