A giant magnetocaloric effect was found in La0.7Ca0.3MnO3 manganite at low magnetic fields. The magnetic entropy changes caused by a magnetic field change of 0.5 and 1.0 T were as large as 5.04 and 6.25 J kg−1 K−1, respectively, which exceed those of perovskite-like magnetic refrigerants or elemental Gd by a factor of 2–3. The extremely high values of the magnetocaloric effect are attributed to a sharp drop in the magnetization at a first-order ferromagnetic–paramagnetic phase transition and S-shaped magnetization versus field dependence.
No takes yet. Share an insight, caveat, or question.
Ulyanov et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: