Reply to the “Comment on papers ‘Effect of Ag substitution on the transport property and magnetoresistance of LaMnO3’ [J. Magn. Magn. Mater. 248 (2002) 26] and ‘Possible magnetic phase separation in Ru doped La0.67Ca0.33’ [J. Magn. Magn. Mater. 257 (2003) 195]”

Comment on papers “Effect of Ag substitution on the transport property and magnetoresistance of LaMnO3” [J. Magn. Magn. Mater. 248 (2002) 26] and “Possible magnetic phase separation in Ru-doped La0.67Ca0.33O3” [J. Magn. Magn. Mater. 257 (2003) 195]

“…The results regarding rðT; 0Þ obtained in Ref. [12] resemble these ones discussed previously. Namely, the increasing of Ru-dopant concentration leads to progressive enhancement of both low-temperature minimum and 'splitting' of rðT; 0Þ peaks (labeled by authors as a 'broad hump' and a 'sharp peak')-see Fig.…”

“…3 from Ref. [12]. The description of this phenomenon also resembles in some way the one by Ye et al [11].…”

“…Thus, above wellknown GB effects must be taken into account upon studying conductivity in doped polycrystalline manganites. In this connection, let us now discuss some data published in the papers [11,12] commented upon. Ye et al presented in their paper [11] results on electrical resistivity and magnetoresistance (MR) of polycrystalline La 1Àx Ag x MnO 3 manganites in the doping interval 0:05pxp0:50: It appears that the rðT; 0Þ curves for xp0:20 show two peaks: the narrow one near T C and the broad one at T max oT C ; see Fig.…”

“…Lakshmi et al in recent paper [12] studied structure, transport and magnetic properties of La 0.67 Ca 0.33 Mn 1Àx Ru x O 3 ceramics (0pxp0:085). The results regarding rðT; 0Þ obtained in Ref.…”

Electroresistance of La0.8Li0.2MnO3

“…1-5͒ and, more broadly, lanthanum manganites doped with other monovalent on divalent ions on either the A or the B site. [8][9][10][11]20,21 Various explanations have been advanced for this rich structure reported in the R-T curves in the lanthanum manganites including grain-size effects, 22 oxidation, 23 percolative phase separation, 24 and phase inhomogeneity. 4 In the present case, it is thought to arise from the grain boundaries in the sample.…”