Influence of Spark Plasma Sintering on Microstructure and Properties of Bulk LaCaSrMnO Magnetocaloric Materials

K. Zmorayováa, V. Antal a, J. Kováč a, P. Diko a and J.G. Noudem b aInstitute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia bCRISMAT, UMR 6508 CNRS/ENSICAEN, Université de Caen Normandie, 6 Bd Maréchal Juin, 14050 Caen Cedex 04, France

Full Text PDF

Polycrystalline La0.67Ca0.33-xSrxMnO3 (x=0.33, 0.03, 0) (LCSM) perovskite samples treated by spark plasma sintering technique were investigated. This study proved influence of the sintering temperature on microstructure of these perovskite ceramics. The thermogravimetric measurements revealed the possibility of increase of oxygen content in studied LCSM samples by additional annealing under oxygen atmosphere and low temperature. Finally, the effect of this annealing on magnetic properties was demonstrated.

DOI: 10.12693/APhysPolA.131.804 PACS numbers: 75.47.Lx, 61.72.-y, 75.30.Kz, 77.80.B-, 81.70.Pg, 81.20.Ev, 81.30.Fb