Magnetothermoelectric power ofPr0.5Sr0.5MnO3

Effects of A-site disorder on magnetic, electrical and thermal properties of La0.5−Ln Ca0.5−Sr MnO3manganites

“…The best fit parameters obtained from Eq. (1) are tabulated in Table 1 and these values are found to be of the same order as previously reported for La 1 À x A x MnO 3 (A ¼Sr, Ba, Pb and Ca) [37], Cr substituted La 0.5 Pb 0.5 MnO 3 [25,26] and Ru substituted Pr 0.5 Sr 0.5 MnO 3 manganites [24]. It is noted that the parameter S 3/2 is five orders of magnitude larger than S 4 , implying the second term (electron-magnon scattering) in Eq.…”

“…The thermodynamic and transport properties of half doped system are intriguing and provide a valuable insight into the colossal magnetoresistance phenomenon in manganites [24][25][26][27][28][29][30][31][32]. However, a systematic study of the A-site substituted random disordered systems is lacking so far.…”

Structural, Morphological, Magneto-Transport and Thermal Properties of Antimony Substituted (La,Pr)2/3Ba1/3Mn1-xSbxO3 Perovskite Manganites

“…The occurrence of magneto-resistance can be explained by Zener's theory of double exchange along-with the formation of Jahn-Teller polarons 20 . In order to understand magnetoresistance behavior and other peculiar properties 29,30,31,32,33 Fig . 3.…”

“…In this regard, several authors have substituted different transition metal ions like Fe +3 , Al +3 , Ga +3 , Zn +2 , Cu +3 , Ni +2 at the Mn-site and have shown that Mn-site substitution severely affects the conduction mechanism as well as the magnetic properties [21][22][23][24][25][26][27][28] . However, fewer results exist for higher valent ion substitution at Mn-site to see its effect on the transport properties [29][30][31][32][33] . Substitutions at Mn-sites in manganites, irrespective of their electronic and magnetic nature, lower the ferromagnetic transition temperature but to different extents except in the case of Ru-doped Pr 0.5 Sr 0.5 MnO 3 where it is found to increase with Ru 32 .…”

“…However, fewer results exist for higher valent ion substitution at Mn-site to see its effect on the transport properties [29][30][31][32][33] . Substitutions at Mn-sites in manganites, irrespective of their electronic and magnetic nature, lower the ferromagnetic transition temperature but to different extents except in the case of Ru-doped Pr 0.5 Sr 0.5 MnO 3 where it is found to increase with Ru 32 . In this work, we have attempted to substitute Sb +5 ion on the Mn-site in two different manganite materials viz.…”