Recently, a large magnetocaloric effect has been reported in La2/3Ba1/3MnO3-δ at about 300 K. In this paper, we investigate the effect of the ion size distribution at the A site on the magnetocaloric effect of this perovskite material. This is accomplished by replacing the lanthanum by Ce, Pr, and Nd, which allows us to study the effect of both the average size, , and the distribution, σrA, on the magnetic properties of the system. Using magnetization and heat capacity measurements, we determine the important magnetocaloric parameters ΔSM and ΔTad of (La1-xAx)2/3Ba1/3Mn1.05O3-δ powders prepared by the Glycine-Nitrate method.
|Publication status||Published - 2009|
|Event||European Congress on Advanced Materials and Processes 2009 - Glasgow, United Kingdom|
Duration: 7 Sep 2009 → 10 Sep 2009
|Conference||European Congress on Advanced Materials and Processes 2009|
|Period||07/09/2009 → 10/09/2009|