Ultrasonic studies on sodium-doped LaMnO3 perovskite material

The parent compound LaMnO3 of the hole-doped colossal magnetoresistance material La1-xAxMnO3 (A=Ca, Sr, Ba) has attracted much

ORBITAL ORDERING AND ANTIFERROMAGNET-FERROMAGNET TRANSITIONS IN LIGHTLY DOPED MANGANITES Mixed-valence manganites with a perovskite structure are the model objects for the physics of strongly correlated electronic systems. The interest in the study of manganites is due to a variety of phase states and transitions and intrinsic correlation of the crystal structure, magnetic, and transport proper...

Luminescent manganese-doped CsPbCl3 perovskite quantum dots

Nanocrystalline cesium lead halide perovskites (CsPbX3, X = Cl, Br, and I) form an exciting new class of semiconductor materials showing quantum confinement. The emission color can be tuned over the full visible spectral region making them promising for light‒emitting applications. Further control over the optical and magnetic properties of quantum dots (QDs) can be achieved through doping of t...

Sodium-doped dimer rows on Si„001..

The stability and electronic structure of a nanowire are studied by first-principles calculations. The wire consists of a single depassivated silicon dimer row on the hydrogen passivated Si~001! 231 surface. We predict that sodium atoms evaporated onto this surface stick preferentially at the depassivated row and partially fill the empty one-dimensional states of this row. This leads to a thin ...

Ultrasonic reflection and material evaluation

2014 An overview is given describing the physical basis of ultrasonic reflectivity as it relates to solid material characterization. The examples given illustrate critical angle reflection, Rayleigh and Lamb waves, and crystal orientation via reflection measurements. Revue Phys. Appl. 20 (1985) 377-381 JUIN 1985, PAGE Classification Physics Abstracts 43.20

Studies of structures, transport and magnetic properties of doped novel three-dimensional perovskite compounds