On the derivation of the magnetocaloric properties in ferrimagnetic spinel Mn3O4

Details On the derivation of the magnetocaloric properties in ferrimagnetic spinel Mn3O4 On the derivation of the magnetocaloric properties in ferrimagnetic spinel Mn3O4

2010-12-23

arxiv.org/abs/1012.5161v1

J. Appl. Phys. 109, 053902 (2011)

Physics

Condensed Matter

Materials Science

Submitted to Journal of Applied Physics, 14 pages, 4 Figures

Scientific paper

10.1063/1.3549706

Large magnetocaloric effect has been observed in Mn3O4 around its ferrimagnetic transition at TN = 42.75 K. Field-induced isothermal entropy changes (\DeltaS) were derived from both magnetic and calorimetric techniques. The maximum |\DeltaS| and adiabatic temperature change ({\Delta}Tad) at TN are 11 J kg-1 K-1 and 1.9 K, respectively, for a magnetic field change of 20 kOe. Moreover, it is found that the complex magnetic phase transitions taking place below TN produce additional -but smaller- features on \DeltaS(T).

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