Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes

Electrical transport properties of Pr1−xSrxMnO3(x= 0 to 0·45)

“…The grains grew by the spiral growth mechanism in a favourable direction ensuing in a lattice distortion or the breaking of Mn-O-Mn bonds at the surface of the grains, thus lowering T c and T im . 14,15 The temperature versus resistivity curves was fitted with r(T)5r o zr 2 T 2 and r5r 0 zr 2?5 T 2?5 , as shown in Fig. 4a and b respectively.…”

The influence of the heat treatment on the structural and magnetic properties of nanoparticle La0.7Ca0.3MnO3 prepared by glycine–nitrate method

“…Perovskite manganites have been systematically investigated in the form of bulk, single crystal and thin film [1,2], while manganites at the nanometer scale recently become the subject of intense research [3][4][5][6][7][8][9][10][11]. From the magnetic viewpoint, the nanoparticle manganites usually exhibit qualitatively new properties, such as changes in magnetic transition temperatures, the emergence of superparamagnetism, size dependence of the saturation magnetization and coercivity, etc.…”

Enhancement of Double-Exchange Mechanism in Charge-Ordered Pr0.75Na0.25MnO3 Ceramics by Cr Doped at Mn-Site

“…Rare-earth manganites with perovskite structure of the general composition of type Re1-xAxMnO3 where Re is a trivalent rare-earth ion such as La, Nd, Dy, Pr and A is a divalent alkaline-earth such as Ca, Sr or Ba has been received remarkable attention due to their unique physical properties as well as potential applications [1][2][3][4][5][6]. In addition, studies on these rare-earth manganites have revealed that colossal magnetoresistance (CMR) effect which is commonly attributed to the double-exchange (DE) mechanism is also suggested to be related to the Jahn-Teller (JT) effect and charge ordering (CO) [7].…”