The low temperature specific heat and entropy of MnBr2.4H2O

✍ Scribed by D.G. Kapadnis; R. Hartmans

• Book ID: 104162343
• Publisher: Elsevier Science
• Year: 1956
• Weight: 397 KB
• Volume: 22
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(56)80024-4

✦ Synopsis

The specific heat of polycrystalline MnBra.4H~O has been measured from 1 to 4.5°I( and from 11 to 20°K. A well defined A-type specific heat anomaly associated with an antiferromagnetic-paramagnetic transition has been observed, the N6el point being 2.136°K. The behaviour of the specific heat curve indicates the persistence of short-range order above the transition point. The net entropy change associated with the process has been found to be about 14.9 joules mole -1 deg -1, one-fifth of it being gained above the N~el point.