Rojas, D. P., Espeso, J. I., Fernandez Rodriguez, J., Gómez Sal, J. C., Sanchez Marcos, J., & Müller, H. (2009). First order ferromagnetic transition in binary CeIn₂. Physical Review B, 80(184413). https://doi.org/10.1103/physrevb.80.184413
E138-03 - Forschungsbereich Functional and Magnetic Materials
-
Journal:
Physical Review B
-
ISSN:
2469-9950
-
Date (published):
2009
-
Number of Pages:
6
-
Publisher:
AMER PHYSICAL SOC
-
Peer reviewed:
Yes
-
Keywords:
Condensed Matter Physics; Electronic, Optical and Magnetic Materials
-
Abstract:
Measurements of the magnetic, thermal, and transport properties of the CeIn2 binary alloy are consistent with a paramagnetic-ferromagnetic transition at TC=22 K. A discontinuity in the magnetic entropy, electrical resistivity and thermal expansion, and a huge anomaly in the specific heat of 113 J/mol K cmag =103 J /mol K , at the magnetic transition, are observed. In addition, the Arrott plots show negative slope at low fields, the field-cooling and field-warming magnetization present irreversibility, and both the susceptibility and the resistivity evidence a small thermal hysteresis of 0.05 K. Moreover, the values of the entropy change calculated from the magnetization data using the Clausius-Clapeyron equation are in good agreement with those directly obtained from the specific-heat data. The joint analysis of all these results provides evidence for the first order character of this magnetic transition in CeIn2.
