Comment on the paper "Nature of Low-Temperature Phase Transitions in CaMn7O12"
R. Przeniosl o, I. Sosnowska
Institute of Experimental Physics, Warsaw University, PL-00 681 Warsaw, Poland
PACS: 65.40.-b, 75.47.Lx
Abstract
We insist on saying that the anomalies observed in
magnetization, specific heat and thermal expansion of
CaMn7O12 at TS = 89 K and TM = 49 K reported in O.
Volkova et al., Pis'ma v ZhETF 82, 498 (2005) [JETP Lett.
82, 444 (2005)] and mentioned in Pis'ma v ZhETF 82 724
(2005) [JETP Lett. 82, 642 (2005)] are both of magnetic
origin.