Size effect on magnetic and dielectric properties in nanocrystalline LaFeO3

Influence of Cr substitution on structural, magnetic and electrical conductivity spectra of LaFeO3

“…The magnetic parameters such as remnant magnetisation Mr and coercivity Hc are shown inFig.5a and b.which indicates that the surface disorder (uncompensated spins) is smaller as result of well grown nano crystallites; similar value is reported by Y. Qiu et al[49]. The Hc values such as 1060.5, 363.5, 928 and 1058 Oe confirms the pinning of AFM phase in FM[44,49]. It is noted that both Mr and Hc decreases for x= 0.1 concentration, which may attributed to dilution of long range Fe-O-Fe interaction, this indicates that Cr behaves as a paramagnetic ion in LaFeO 3 .…”

“…This behaviour can be interpreted as a core (AFM) / shell model (FM)[44]. The magnetic parameters such as remnant magnetisation Mr and coercivity Hc are shown inFig.5a and b.which indicates that the surface disorder (uncompensated spins) is smaller as result of well grown nano crystallites; similar value is reported by Y. Qiu et al[49]. The Hc values such as 1060.5, 363.5, 928 and 1058 Oe confirms the pinning of AFM phase in FM[44,49].…”

Optical, Dielectric and Magnetic Properties of La1−xNdxFeO3 Powders and Ceramics

“…It should be noted that undoped sample revealed two relaxation peaks at 60 Hz and 20 kHz. Similar behavior was observed for 80 nm LaFeO3 sample [22]. In this frequency range, the loss peaks could be explained by the dipole relaxations.…”

Polymer pyrolysis synthesis and magnetic properties of LaFeO3 nanoparticles

“…Table 1. It is found that observed ferromagnetism in our LFO nanoparticles is due to spin canted of Fe 3 þ as the source of the magnetic moments [20]. Therefore, the RT-FM in our samples can be explained by the supper exchange (SE) interaction of Fe 3 þ -O 2--Fe 3 þ ions, which induces FM shell model at the surface of a particle due to disordering spins while AFM core is induced due to ordering spin [21,22].…”