Low temperature heat capacities of boracites

Low temperature specific heat measurements have been performed on Mn 3 B 7 O 13 Br and Fe 3 B 7 O 13 I boracites. As expected, we observe mag-netic ordering at low temperatures. The Neel temperature of the Fe 3 B 7 O 13 I (Fe-I) boracite (31.4 K) differs significantly from the Neel temperature of Fe...

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Bibliographic Details
Published in:Ferroelectrics 2016-08, Vol.498 (1), p.36-39
Main Authors: Castellanos-Guzman, A. G., Soto García, V. M., Bayarjargal, L., Haussühl, E., Winkler, B.
Format: Article
Language:English
Subjects:
boracites
electron microscopy
Ferroelectric materials
Ferroelectricity
Ferroelectrics
ferroic domains
Heat
Heat capacity
Low temperature physics
Manganese
Microscopy
Neel temperature
Order disorder
polarizing microscopy
Specific heat
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Summary:Low temperature specific heat measurements have been performed on Mn 3 B 7 O 13 Br and Fe 3 B 7 O 13 I boracites. As expected, we observe mag-netic ordering at low temperatures. The Neel temperature of the Fe 3 B 7 O 13 I (Fe-I) boracite (31.4 K) differs significantly from the Neel temperature of Fe 3 B 7 O 13 Cl (Fe-Cl) boracite (11.8 K, Schnelle et al., 1999). The same is true for the Mn 3 B 7 O 13 Br (Mn-Br) boracite, where we observe a transition at 25.9 K, while Schnelle et al. (1999) observed the transition in Mn 3 B 7 O 13 Cl (Mn-Cl) boracite at 11 K.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2016.1166849