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Pr(0.67)Ba(0.33)MnO(3) in Bulk and Thin Film Ceramic

Author:
Wong, J. K.  Lim, K. P.  Halim, S. A.  Chen, S. K.  Ng, S. W.  Gan, H. M. Albert  


Journal:
MALAYSIA ANNUAL PHYSICS CONFERENCE 2010 (PERFIK-2010)


Issue Date:
2011


Abstract(summary):

Bulk polycrystalline of Pr(0.67)Ba(0.33)MnO(3) (PBMO) ceramic prepared via solid-state reaction and converted into thin films on corning glass, fused silica and MgO (100) by pulsed laser deposition (PLD) technique. As compared to bulk PBMO, the unit cell in thin film PBMO experienced positive misfit due to lattice strain induced by substrate used resulting MnO(6) to deform (change in Mn-O-Mn bond angle and Mn-O bond length). Bulk PBMO had large grains (similar to 1.5 mu m) as compared to thin film which are nano-sized (<100nm). Two metal-insulator transition temperatures, T(p) (156 K and 190 K) were observed in bulk due to core-shell effect as proposed by Zhang et al. In summary, variation of electrical behaviour was observed between bulk and thin film samples which believed to be due to the difference of ordering in core (body) and grain surface.


Page:
251---253


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