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http://dx.doi.org/10.4313/JKEM.2010.23.12.949

Phase Evolution Behavior of (Bi,Nd)(Fe,Ti)O3 Ceramics and Thin Films  

Kim, Kyung-Man (School of Materials Science and Engineering, Yeungnam University)
Lee, Hee-Young (School of Materials Science and Engineering, Yeungnam University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.23, no.12, 2010 , pp. 949-955 More about this Journal
Abstract
Nd and Ti co-doped bismuth ferrite $(Bi_{1-x}Nd_x)(Fe_{1-y}Ti_y)O_3$ (x, y = 0, 0.05, 0.1, 0.2) ceramics and thin films were synthesized through the conventional mixed-oxide process and pulsed laser deposition (PLD), respectively. Nd and Ti co-doping effect was examined with emphasis on how these impurities affect phase formation behavior as there could be the improvement in leakage current problems often associated with multiferroic $BiFeO_3$ (BFO) thin films. The lattice constants of BFO ceramics decreased with Nd doping concentration up to 10mol%, while they further decreased with Nd and Ti co-doping to about 20%. BFO thin films obtained by the PLD process revealed random polycrystalline structure. Similar to bulk BFO ceramic, Nd and Ti co-doping effectively suppressed the formation of unwanted secondary phase and thus stabilized the perovskite phase in BFO thin films.
Keywords
Multiferroic; BFO; BNFTO; Nd and Ti co-doping; Pulsed laser depostion;
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