Specific heat of Nd0.67Sr0.33MnO3
Abstract
The specific heat of the colossal magnetoresistance material Nd0.67Sr0.33MnO3 is reported for 0.35<=T<=280 K, H=0 and 1<=T<=120 K, H=9 T. The results include a Schottky-like specific-heat anomaly for the Nd ordering, an ``attenuation'' of the Mn ordering anomaly, and a T-dependent ``linear term,'' γ(T)T. This unusual combination of features is interpreted as arising from an interaction between the Nd and Mn spin systems. The expected magnetic entropy is recovered only if a contribution from the γ(T)T term is included.
- Publication:
-
Physical Review B
- Pub Date:
- January 1999
- DOI:
- Bibcode:
- 1999PhRvB..59..127G
- Keywords:
-
- 75.40.Cx;
- 65.50.+m;
- 71.30.+h;
- 75.30.Et;
- Static properties;
- Metal-insulator transitions and other electronic transitions;
- Exchange and superexchange interactions