Eur. Phys. J. B 12, 393-396 (1999)
https://doi.org/10.1007/s100510051020

Cation disorder and size effects on the magnetic transition in Ba-containing ferromagnetic manganites

¹ Donetsk Institute of Physics & Technics, Academy of Sciences of Ukraine, Rozy Luxembourg 72, 340114 Donetsk, Ukraine
² Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 53 Praha 6, Czech Republic

Corresponding author: ^a novakp@fzu.cz

Received: 5 March 1999
Published online: 15 December 1999

Abstract

The results of ⁵⁵Mn NMR, dc magnetization, and ac susceptibility studies are presented for La_0.7Ca_0.15Ba_0.15MnO₃, La_0.7Sr_0.15Ba_0.15MnO₃, and La_0.7Ba_0.3MnO₃ ferromagnetic manganites. While T_C is a function of the mean radius of the La and alkaline-earth ions and the cation disorder, the form of the temperature dependence of the magnetic moment may be expressed as function of T_C only. The phase transition is continuous for all three compounds.