Pham Thanh Phong

TL;DR: In this paper, the temperature dependence of the electrical resistivity in (1 − x ) La 0.7 Ca 0.3 MnO 3 ǫ+x Ag composites has been investigated between 5 and 300 k for H Â = 0 and 3 T, respectively, and the ρ-T of all samples fit well with the phenomenological percolation approach, which is based on the phase segregation of ferromagnetic metallic clusters and paramagnetic insulating regions.

TL;DR: In this paper, magneto-transport and magnetic properties of (1 − x )La 0.7 Ca 0.3 MnO 3 + x Al 2 O 3 composites synthesized through a solid-state reaction method combined with a high energy milling method were reported.

TL;DR: In this paper, the particle size effects on the magnetic and magneto caloric properties of La0.7Ca0.3MnO3 nanoparticles were investigated and the existence of so-called Griffiths singularity above Curie temperature has been confirmed from non-Curie-Weiss behavior in samples.

TL;DR: In this paper, the effect of Al 2 O 3 on the low field magnetoresistance ( LFMR) of La 0.7 Ca 0.3 MnO 3 ǫ+ǫ x Al 2O 3 composite synthesized through a solid-state reaction method combined with an energy milling method was reported.

TL;DR: In this paper, the hydrodynamic diameter of CoFe2O4 (hard ferrite) and MnFe 2O4(soft ferrite)-nodes was measured and fitted to a lognormal distribution and the results showed their polydispersity is very narrow.