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Research and Application of Novel Magnetic Properties of Nanostructured Materials 20 PB05206248 – PowerPoint PPT presentation

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Title: ??? 20? PB05206248


1
????????????
Research and Application of Novel Magnetic
Properties of Nanostructured Materials
  • ??? 20? PB05206248
  • ???????

2
???????????????????1100nm????

??? ???? ???? ?? ?? ??
3
?????????????????????
(1)?????
  • ???????????

4
  • ??????????????????????????

(a)??? (b)??
5
??????
???,Md1.71106Am-1,??
1.810 6Jm-3
?L0.01m,???????????????

(L1)1.810 4 6Jm-2
???,(b)??,?????????????????, ??????D,??????????
D

2
20.852110-7
D1.710-7
6
????
  • ????????,???????????????????,?????1,??L,?????????1
    /D???,??1/D???,???????L,??????????L1/DL/D,??????
    ?????????


??????????
1.710-7
D
?????
?
??
7
  • ???,

1.71106Am-1
1.5910-3Jm-2
L0.01m,?????E5.6Jm-2
???,????,
?????????????????????, ???????????????
8
(2)??????????????
  • ????,??????,???????????

???????????????????
?????????????
(a)??? (b)???
??????????
9
????9nm????
  • ????????

k???????
V??????? ??9?????T631K?,??????K?5.810-2J? ????
??
10-11s
4.1810-17s
????????????????????
?????
n??????
7
10-17s
10
  • ???????????????????????,??????????????????????????
    ???,???????

????D nm 10 18 38 58 80
???HC 103/4pAm-1 0 78 195 240 200
11
  • ?Origin?????

12
????
  • ????????????????? ??

13
????
14
?????????
  • ????????????????????????

15
?????????
  • ????????????

?? ??????(T) ????
?-A 0 ???????
?-B 0.15 ???????????
?-C 0.25 ?????????
?-D 0.35 ?????????
16
?????
????????????,???????, ????????????????????????
17
  • ??,????,??????????,???????????????,???????QVB,
    ???????,???????????(?????????????????)????????(QV
    B)???,????????????????,????????? ???

18
??
  • ???????????????????????,????????????????????
  • ??1T??????????????????
  • ????????????????????????????
  • ???????????????????????????????????????/??

19
??science??????????? ??????
???????????? ?????????????????
20
  • ???? (bottom-up)
  • ???? (mesocrystal)
  • ??? (self-assemble)

(A)?? (B)????
21
????
  • 1H.Zeng, J.Li, J.P.Liu. Exchange-coupled
    nanocomposite magnets by nanoparticle
    self-assembly J
  • Nature,2002.420395-398.
  • 2H.L.Sun, H.T.Shi, F.Zhao, L.M.Qi.Shape-depende
    nt magnetic properties of low-dimensional
    nanoscale Prussian blue agalogue SmFe(CN)64H2O
    J
  • Chem.Commun.,2005.(DOI10.1039/b507240a)
  • 3C.B.Rong, D.R.Li, V.Nandwana.Size-dependent
    Chemical and Magnetic Ordering in L10-FePt
    NanoparticlesJ
  • Adv.Mater.,2006,182984-2988.(DOI10.1002/adma.200
    601904)
  • 4D.B.Yu, X.Q.Sun, J.W.Zou. Oriented Assembly
    of Fe3O4 Nanoparticles into Monodisperse Hollow
    Single-Crystall MicrospheresJ
  • J.Phys.Chem.B.,2006,110(43)21667-21671.(DOI10.10
    21/jp0646933)

Nature
Science
Adv.Mater.
J.Am.Chem.Soc.
Cryst.Growth
22
  • Thanks for your attention!
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