Structural transformation and ferroelectromagnetic behavior in single-phase Bi1−xNdxFeO3 multiferroic ceramics
Structural transformation and ferroelectromagnetic behavior in single-phase Bi1−xNdxFeO3 multiferroic ceramics
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DOI：
10.1063/1.2266992
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发表时间：
2006-08
影响因子：
4
通讯作者：
G. Yuan;S. Or;J. Liu;Z. Liu
中科院分区：
文献类型：
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作者：
G. Yuan;S. Or;J. Liu;Z. Liu
制备了Bi1−xNdxFeO3 (BNFOx) （x= 0-0.2）单相多铁陶瓷，研究了Nd取代对其晶体结构和铁电磁行为的影响。x射线衍射数据的Rietveld细化表明，晶体结构从BNFOx=0 （BiFeO3）的菱形结构不断转变为BNFOx= 0.05-0.15时的三斜结构和BNFOx= 0.175-0.2时的伪四方结构。铁电磁测量表明，在BNFOx= 0-0.175时存在铁电性，残余磁化强度为~ 9μC∕cm2，在BNFOx=0.2时存在副电性，在BNFOx= 0.15-0.2时存在弱铁磁性，残余磁化强度为0.07 - 0.227 μ c∕cm2。在尼尔温度（~ 380℃）附近，BNFOx=0.15 ~ 0.175时磁电耦合明显。
Single-phase Bi1−xNdxFeO3 (BNFOx) (x=0–0.2) multiferroic ceramics were prepared to study the effects of Nd substitution on their crystal structure and ferroelectromagnetic behavior. Rietveld refinement of x-ray diffraction data showed a continual transformation of crystal structure from the rhombohedral structure of BNFOx=0 (BiFeO3) to a triclinic structure in BNFOx=0.05–0.15 and a pseudotetragonal structure in BNFOx=0.175–0.2. Ferroelectromagnetic measurements revealed the existence of ferroelectricity with remnant polarization of ∼9μC∕cm2 in BNFOx=0–0.175, paraelectricity in BNFOx=0.2, and weak ferromagnetism with remnant magnetizations of 0.07–0.227emu∕g in BNFOx=0.15–0.2. Magnetoelectric coupling was obvious in BNFOx=0.15–0.175 near the Neel temperature of ∼380°C.