We present a detailed study of the polycrystalline perovskite manganites La 0.67 Ca 0.33 Al
x Mn 1-x O 3 (x= 0, 0.1, 0.15, 0.5) at low temperatures and high magnetic fields, including …

The effect of the substitution for Mn with Al in the magnetoresistive perovskite La 2/3 Ca 1/3
MnO 3 has been studied by preparing the series La 2/3 Ca 1/3 Mn 1− x Al x O 3 (x⩽ 0.2). A …

Abstract La 0.8− x□ x Ca 0.2 MnO 3 (x= 0, 0.1 and 0.20) samples were prepared by the
conventional solid-state reaction and annealed at 1200 K. X-ray diffraction and scanning …

We report measurements of magnetoresistance and magnetization in a polycrystalline La0.
5Ca0. 5MnO3 sample. The results show the way in which a magnetic field is applied may …

We present a systematic study of the magnetotransport and magnetic properties of the half-
doped La 0.5 Ca 0.5 MnO 3+ δ system. The solid is a metamagnet which undergoes a first …

La _1-x Ca _x MnO _3 perovskites show semiconducting properties in the paramagnetic
range. The gap is reduced near x= 0.33, where ferromagnetic ordering is observed. The …

We have studied magnetization, resistivity and magnetoresistance in polycrystalline La0.
67Sr0. 33-x□ xMnO3 samples where 0≤ x≤ 0.33. With varying x, powder X-ray diffraction …

Electrical resistivity, magnetoresistance and magnetic susceptibility were measured for
ceramic (La 1− y Pr y) 0.7 Ca 0.3 MnO 3 samples (y= 0.75 and 1) with different content of 18 …

The influence of grain boundaries on the magnetoresistance in the perovskite manganites
La 0.7 A 0.3 MnO 3 (A= Ca, Sr) and the layered perovskite manganites La 1.36 Sr 1.64 Mn 2 …

The magnetization and magnetoresistance are studied in La 0.5 Ca 0.5 MnO 3− γ as a
function of oxygen content. It is found that as the oxygen content is decreased, this …