The coexistence of cluster glass behavior and long-range ferromagnetic ordering in La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 manganite

The electron-doped La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 (LSNMTi0.3) sample was synthesized by a conventional solid-state reaction. Rietveld analysis of the X-ray diffraction (XRD) data showed that the compound crystallized in the space group R  3¯c. Magnetic characterization present a signature of a coexisting AFM–FM ordering and a cluster-glass phase. The M2 vs. H/M curves prove that the samples exhibit a second-order magnetic phase transition and the critical properties near the ferromagnetic–paramagnetic phase transition temperature have been analyzed from data of the static magnetization measurements for the sample, through various techniques such as the modified Arrott plot and the critical isotherm analysis. The critical exponent values estimated from the isothermal magnetization measurements are found to be consistent and comparable to those predicted by the long-range mean-field theory.

Graphical abstractTemperature dependences of the FC and ZFC magnetizations for La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 under an applied field of 500 Oe.Figure optionsDownload full-size imageDownload as PowerPoint slide