BiFeO3???????????????

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?????????
BiFeO3??????????????? ???????? 2006 ? 11? ???
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??????

• ??????
• BiFeO3????-??????
• ????????
• ??????????????
• ??

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??????
????????????,????????? ?????????????????????
PZT?????
Bi0.85Ba0.15FeO3?????
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??????
????? ????? ??????????????
?????????BaTiO3?????
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??????

• ?????????
• RMnO3?? R?Sc, Y, In, HoLu
• BiRO3 ?? R?Fe,Cr, Mn
• ??BaFeO3 PbTi1-xFexO3?

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BiFeO3????-??????
BiFeO3 ???
C????BiFeO3?? ???????????
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BiFeO3????-??????
BiFeO3 ????
Tc1103 K SCIENCE 299 14 2003
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BiFeO3????-??????
TN643 K
BiFeO3 ???
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BiFeO3????-??????
BiFeO3 ???
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BiFeO3????-??????
BiFeO3??????? ???????? ?????? ???????? ??-
????
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BiFeO3???-??????
Bi(NO3)3.9H2O
? ?
??
????
?????
? ? ?
? ? ?
Fe(NO3)3.5H2O
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BiFeO3???-??????
350 ? ? ? ?
? ?
? ?
450?-600 ? ??
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????????

• 1. ?ITO/glass?LaNiO3/Si(111)?
• LaNiO3/SiO2/Si(111)??Pt/Ti/SiO2/Si
  ???????BiFeO3?????????????????
• 2. ?BiFeO3?????A??B??????,?????????????
• 3. ?BiFeO3???A??B?????,???
• BiFeO3-PbTiO3?PZT-BiFeO3????????????????????
  ??????????????

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???????? 1. BiFeO3???????????
(1) ?ITO/glass ????BiFeO3??
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???????? 1. BiFeO3???????????
(1) ?ITO/glass ????BiFeO3??
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???????? 1. BiFeO3???????????
(1) ?ITO/glass ????BiFeO3??
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
250 nm
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
450 ? 3.2µC/cm2 500 ? 4.1 µC/cm2 550 ?
6.4µC/cm2 600 ? 2.1µC/cm2
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
LNO 3.81 Å BFO 3.96 Å
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
1.15?1.25
Slope 1.15 and 1.25 2.64 ?4.78 translation
voltage 1 kV/cm
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
0.255µC/cm2 0.36µC/cm2 2.27µC/cm2 2.97µC/cm2
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???????? 1. BiFeO3???????????
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???????? 1. BiFeO3???????????
???? 1.??????????-???????BiFeO3??,
??????????,???????????????????????????????????????
????????????????????????????????? 2.
?????BiFeO3???LaNiO3??????????????????????????????
??? 3. ?????BiFeO3??????????????????????????BiFeO
3???????,????????????????????????
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???????? 2. BiFeO3??????????? (A?La??) LaxBi1-xF
eO3 ??????? X0,5,10,20 1t0.77
X0.8479?0.8486
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???????? 2. BiFeO3??????????? (A?La??)
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???????? 2. BiFeO3??????????? (A?La??)
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???????? 2. BiFeO3??????????? (A?La??)
2Pr? x0 3.35µC/cm2 x5 3.20µC/cm2
x10 4.40µC/cm2 x20 3.49µC/cm2
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???????? 2. BiFeO3??????????? (A?La??)
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???????? 2. BiFeO3??????????? (B?Ti??
ITO/glass?? 600 ???)
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???????? 2. BiFeO3??????????? (B?Ti??
ITO/glass?? 600 ???)
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???????? 2. BiFeO3??????????? (B?Ti??
LaNiO3/SiO2/Si?? 600 ???)
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???????? 2. BiFeO3??????????? (B?Ti??
LaNiO3/SiO2/Si?? 600 ???)
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???????? 2. BiFeO3??????????? (B?Ti??
LaNiO3/SiO2/Si?? 600 ???)
2Pr 0 82 kV/cm
1.2µC/cm2 5 82 kV/cm 0.58µC/cm2 10 135
kV/cm 3.8µC/cm2
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???????? 2. BiFeO3??????????? (B?Ti??
LaNiO3/SiO2/Si?? 600 ???)
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???????? 2. BiFeO3??????????? (B?Ti??
LaNiO3/SiO2/Si?? 600 ???)
Ms 0 22.78 emu/cm3 5
22.86 emu/cm3 10 22.65 emu/cm3
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???????? 2. BiFeO3??????????? (B?Zr??
ITO/glass?? 600 ???)
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???????? 2. BiFeO3??????????? (B?Zr??ITO/glass??
600 ???)
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???????? 2. BiFeO3??????????? (B?Zr??ITO/glass??
600 ???)
2Pr 0 200 kV/cm
2.26µC/cm2 5 200 kV/cm 3.9µC/cm2 10 200
kV/cm 3.8µC/cm2 20 200 kV/cm 5.8µC/cm2 30
400 kV/cm 2.2µC/cm2 40 400 kV/cm 1.3µC/cm2
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???????? 2. BiFeO3??????????? (B?Zr??ITO/glass??
600 ???)
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???????? 2. BiFeO3??????????? (B?Zr??ITO/glass??
600 ???)
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???????? 3. BiFeO3????????????? (BiFeO3)1-x-(PbTi
O3)x LaNiO3/SiO2/Si?? 500 ???
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???????? 3. BiFeO3????????????? (BiFeO3)1-x-(PbTi
O3)x LaNiO3/SiO2/Si?? 500 ???
?? 400 nm
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???????? 3. BiFeO3????????????? (BiFeO3)1-x-(PbTi
O3)x LaNiO3/SiO2/Si?? 500 ???
Pr 0 32 kV/cm 0.2µC/cm2
5 32 kV/cm 0.34µC/cm2 10 32 kV/cm
1.0µC/cm2 20 55 kV/cm 1.7µC/cm2 30 55
kV/cm 2.05µC/cm2
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???????? 3. BiFeO3????????????? (BiFeO3)1-x-(PbTi
O3)x LaNiO3/SiO2/Si?? 500 ???
Ms 5000 Oe
0 21.65 emu/cm3 5 29.44
emu/cm3 10 25.79 emu/cm3
20 26.4 emu/cm3 30
21.98 emu/cm3
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???????? 3. BiFeO3????????????? (BiFeO3)1-x-(PbTi
O3)x LaNiO3/SiO2/Si?? 500 ???
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???????? 3. BiFeO3?????????????
???? 1)?BiFeO3?????B??Zr?????????5
?Zr???????????????????????????????????????????????
?????????????????????????????????????????????????
????????B?Zr??????????????? 2)
?BiFeO3?????B??Ti???????????ITO???????????????????
?????????????????????????????????????
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???????? 3. BiFeO3?????????????
???? 3)???BiFeO3-PbTiO3?PZT-BiFeO3??????????????
????PbTiO3?BiFeO3?A??B?????????PbTiO3?????10?????
???????????????????????????????B??????????????????
????????????????????BiFeO3?PZT????????????????????
????,?????????????????????,??????????????????
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??????????????
1Zuli Liu, Hongri Liu , Guihuan Du, Jian Zhang
and Kailun Yao, Electric properties of
BiFeO3 films deposited on LaNiO3 by sol-gel
process, Journal of Applied Physics
2006,100(4)004110 1-5.(SCI) 2Liu Hongri, Liu
Zuli, Liu Qing and Yao Kailun, Electric and
magnetic properties of multiferroic
(BiFeO3)1-x-(PbTiO3)x films prepared by
sol-gel process, Journal of Physics D Appled
Physics 2006,3910221027.(SCI) 3Hongri Liu,
Zuli Liu, Qing Liu and Kailun Yao, Ferroelectric
properties of BiFeO3 films grown by
solgel process, Thin Solid Films, 2006,500
105109. (SCI) 4Hongri Liu, Zuli Liu and
Kailun Yao, Improved electric properties in
BiFeO3 films by the doping of Ti, Journal of
sol and gel science and technology, 2006(in
press). 5Hongri Liu, Zuli Liu and Kailun Yao,
Study of the electric properties of
BiFe1-xZrxO3d films prepared by the sol-gel
process, Physica B 2006(in press). 6Liu
Hongri, Liu Zuli, and Yao Kailun, Bi1-xLaxFeO3
films on LaNiO3 bottom electrode by sol-gel
process, Journal of Physics D Appled Physics.
(in press).
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??????????????
7Liu Hongri, Liu Zuli, Li Xiaolu and Yao
Kailun, Ferroelectricity and dielectric
properties at room Temperature on different
oriented BiFeO3 thick films prepared by sol-gel
process, Chinese Physics (submitted). 8Liu
Hongri, Liu Zuli, Li Xiaolu and Yao Kailun, Study
on the Ti substitution effects in BiFeO3
films prepared by sol-gel process, Physica B
(submitted). 9Liu Hongri, Liu Zuli, and Yao
Kailun, Ferroelectric and dielectric property of
BiFeO3 films deposited on Pt bottom electrode
by sol gel process, (to be submitted). 10Hongri
Liu, Zuli Liu, and Kailun Yao, Study on the
solid solution effects of BiFeO3 on PZT films,
(to be submitted). 11???,???,???,La?BiFeO3??
?????,?????????(???)
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Thank you for your attention!