R.L. Zhang

Structural, magnetic, and transport properties of the Cu-doped manganite La0.85Te0.15Mn1-xCuxO3 (0≤x≤0.20)

The effect of Cu-doping at Mn-site on structural, magnetic and transport properties in electron-doped manganites La0.85Te0.15Mn1-xCuxO3 has been investigated. Based on the analysis of structural parameter variations, the valence state of the Cu ion in Cu-doped manganites is suggested to be +2. All samples undergo the paramagnetic-ferromagnetic (PM-FM) phase transition. The Curie temperature decreases and the transition becomes broader with increasing Cu-doping level, in contrast, the magnetization magnitude of Cu-doping samples at low temperatures increase as x \leq 0.15. The insulator-metal (I-M) transition moves to lower temperatures with increasing Cu-doping content and disappears as x > 0.1. In addition, the higher temperature resistivity r peak in double-peak-like r(T) curves observed in no Cu-doping sample is completely suppressed as Cu-doping level x = 0.1 and r(T) curve only shows single I-M transition at the low temperature well below . The results are discussed according to the change of magnetic exchange interaction caused by Cu-doping.

The effect of grain size on electrical transport and magnetic properties of La 0.9 Te 0.1 MnO 3.

Abstract The effect of grain size on structural, magnetic and transport properties in electron-doped manganites La0.9Te0.1MnO3 has been investigated. All samples show a rhombohedral structure with the space group R 3 ¯ C at room temperature. The Mn–O–Mn bond angle decreases and the Mn–O bond length increases with the increase of grain size. All samples undergo paramagnetic (PM)-ferromagnetic (FM) phase transitions and the interesting phenomenon that both magnetization and the Curie temperature TC decrease with increasing grain size is observed, which is suggested to mainly originate from the increase of the Mn–O bond length dMn–O. Additionally, ρ obviously increases with decreasing grain size due to the increase of both the height and width of tunneling barriers with decreasing grain size. The results indicate that both the intrinsic colossal magnetoresistance and the extrinsic interfacial magnetoresistance can be effectively tuned in La0.9Te0.1MnO3 by changing grain size.

Structural, magnetic, and transport properties in the Pr -doped manganites La 0.9 − x Pr x Te 0.1 MnO 3 ( 0 ⩽ x ⩽ 0.9 )

The effect of

The influence of Cr doping on the charge-ordering state in bilayered LaSr2Mn2O7

\mathrm{Pr}

Photoinduced spin-state transition of Co3+ in the layered perovskite manganite thin film

-doping on structural, magnetic and transport properties in electron-doped manganites

The effect of oxygen content on the magnetic cluster in the paramagnetic region of La0.67Ca0.33MnOy

{\mathrm{La}}_{0.9\ensuremath{-}x}{\mathrm{Pr}}_{x}{\mathrm{Te}}_{0.1}{\mathrm{MnO}}_{3}\phantom{\rule{0.3em}{0ex}}(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.9)

Internal friction study on the phase separation behaviour in La0.8Ca0.2MnO3

with fixed carrier concentration is investigated. The room temperature structural transition from rhombohedral

The response for magnetic field, current and photo irradiation of charge-ordering LaSr2Mn2O7 thin film

(R\overline{3}C)

Effects of Co doping in bilayered manganite LaSr2Mn2O7 : Resistivity, thermoelectric power, and thermal conductivity

to orthorhombic

Structural, transport, and magnetic properties in the Ti-doped manganites LaMn1−xTixO3 (0≤x≤0.2)

(Pbnm)