Relaxation phenomena in super spin glass nanoparticle manganite La0.7Ca0.3MnO3

Influence of sol–gel parameters in the fabrication of ferromagnetic La2/3Ca1/3MnO3 nanotube arrays

“…Such bifurcation corroborates the existence of metastable magnetic behaviors such as spin glasses or superparamagnetic state at low temperatures [22,23]. However, the bifurcation that starts from above the maximum temperature (T max ) and the nature of increased magnetization values at low temperature (T ≤ T C ) indicate the presence of superparamagnetic behavior in LCMO-2 sample.…”

Impact of a small amount of vacancy in both lanthanum and calcium on the physical properties of nanocrystalline La0.7Ca0.3MnO3 manganite

“…With research attention given to nanoparticle form, a number of synthesis methods for doped manganites are proposed and tested including, the sol-gel, the reactive milling and the floating zone methods [7][8][9][10][11].…”

Particle Size Effects on Charge Ordering and Exchange Bias in Nanosized Sm0.43Ca0.57MnO3

“…Magnetic nanoparticles (NPs) are in a focus of intensive investigations, mostly due to an appearance of many features that are not observed in their bulk counterparts. − Of a special interest are complex transition metal oxides forming strongly correlated electron systems in which interplay between spins differently ordered, charge, orbital, and lattice subsystems, results in rich phase diagrams containing charge-, spin-, and orbital-ordered phases. It has been reported that by reducing the size of such systems to the nanoscale, one can significantly influence coupling between the subsystems, change the stability of ordered phases, and hence modify the physical properties of the system. − Recently, particular attention has been paid to nanosized perovskite manganites with R 1– x A x MnO 3 formula, where R and A are rare earths and alkaline earths, respectively. − Phenomenological models and Monte Carlo studies of antiferromagnetic (AFM) charge ordered (CO) nanomanganites predict that reduction of the system size to the nanoscale range leads to an enhancement of the surface charge density, a suppression of AFM/CO phase, and an emergence of ferromagnetic (FM) order with spin-glass (SG)-like behavior near the surface . As a consequence, natural AFM/FM interfaces and exchange bias (EB) effect appear in nanosized manganites.…”