Investigation of the electrical and magnetic properties of electron-doped Ruddlesden–Popper phases, CaO(Pr0.08Ca0.92MnO3)n (n=1, 2, 3 and ∞)

✍ Scribed by L Sudheendra; A.R Raju; S.E Lofland; K.V Ramanujachary

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 128 KB
• Volume: 126
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/s0038-1098(03)00208-4

✦ Synopsis

The electrical and magnetic properties of Pr 3^-doped Ruddlesden -Popper manganates with the formula, CaOðPr 0:08 Ca 0:92 MnO 3 Þ n (n ¼ 1,2,3 and 1) have been investigated. The electrical conductivity of the samples increases with the number of perovksite slabs sandwiched between the rock-salt-like CaO layers. Magnetic susceptibility measurements show an anomalous behavior for the n ¼ 1 composition which is attributed to the near absence of ferromagnetic correlations in a two-dimensional system. The magnetic behavior of other members can, however, be understood on the basis of a 'ferromagnetic-droplet' model. Since the number of electrons per perovskite slab is invariant across the series, the electronic properties are readily correlated to the phase space available for exchange interactions.