Low field magnetoresistance of La 0.7 Ca 0.3 MnO 3 ceramics fabricated by fast sintering process

Effect of The Calcination Process On The Magnetotransport Properties in Co-Precipitation Derived La0.67Ca0.33MnO3 Ceramics

“…Fig. 5(a) is the ρ-T curves of LCMO with tcal of 0, 2, 8, and 24 h. For tcal of 0 h (that is, the temperature is lowered just after the sample is heated to 500 ºC), the resistivity is as high as 1.0412 Ω•cm, which is much higher than other study [33]. This may be that Ca(OH)2 etc.…”

Small angle neutron scattering study of magnetic clustering in (Pr0.55Ca0.45)(Mn1−yCry)O3 manganites

“…Sintering processes are also able to influence the manganites physics due to the modulation of the grains and crystallites size, as in the case of a low field magnetoresistance observed in (La 0.7-Ca 0.3 )MnO 3 ceramics made by fast sintering [15] or a paramagnetic and FM phases coexistence in (Pr 0.6 Sr 0.4Àx Na x )MnO 3 (x = 0.00, 0.05) with a growing ferromagnetism inside small crystallites [16]. Moreover in compounds like (Bi 0.3 Ca 0.7 )(Mn 0.75 Cr 0.25 )O 3 the MR phenomenon below the magnetic ordering temperature was ascribed to the coupling of the Cr 3+ moments and the canted Mn 3+ / Mn 4+ moments [17].…”