采用化学还原方法制备出具有纳米尺度的Co颗粒,并在其表面包覆1层MnO2膜,从而制备出具有核/壳结构的Co/MnO2颗粒.应用热处理手段,制备出3种不同类型的核/壳样品,分别通过XRD、TEM、SEM测量手段,对它们进行结构分析.并同时对这种铁磁/反铁磁的核壳结构样品进行磁性研究,发现包覆热处理后的Co颗粒具有可观的交换偏置现象.
参考文献
| [1] | Zhong J L;Boyd C;Luo W .[J].Physical Review Letters,1996,77(02):390-393. |
| [2] | Kodama R H .[J].Journal of Magnetism and Magnetic Materials,1999,200(1-3):359-372. |
| [3] | Martn′a J I;Nogueésb J;Liuc K et al.[J].Journal of Magnetism and Magnetic Materials,2003,256(1-3):449-501. |
| [4] | Mamiya H.;Furubayashi T.;Nakatani I. .Blocking and freezing of magnetic moments for iron nitride fine particle systems[J].Physical review letters,1998(1):177-180. |
| [5] | D. L. Peng;K. Sumiyama;T. Hihara;S. Yamamuro .Enhancement of magnetic coercivity and macroscopic quantum tunneling in monodispersed Co/CoO cluster assemblies[J].Applied physics letters,1999(24):3856-3858. |
| [6] | G. H. Wen;R. K. Zheng;K. K. Fung .Microstructural and magnetic properties of passivated Co nanoparticle films[J].Journal of Magnetism and Magnetic Materials,2004(3):407-412. |
| [7] | Chang W K;Young H K;Hyun G C et al.[J].Journal of Physical Chemistry B,2006,110:24418-24423. |
| [8] | Huang KC;Ehrman SH .Synthesis of iron nanoparticles via chemical reduction with palladium ion seeds[J].Langmuir: The ACS Journal of Surfaces and Colloids,2007(26):1419-1426. |
| [9] | Roy A;Srinivas V;Ram S et al.[J].Journal of Physics:Condensed Matter,2007,19(34):346220. |
| [10] | Peng D L;Sumiyama K;Hidara T et al.[J].Physical Review B:Condensed Matter,2000,61(04):3103-3109. |
| [11] | D. L. Peng;T. Hihara;K. Sumiyama;H. Morikawa .Structural and magnetic characteristics of monodispersed Fe and oxide-coated Fe cluster assemblies[J].Journal of Applied Physics,2002(6):3075-3083. |
| [12] | Tian Z M;Yuan S L;Liu L et al.[J].Journal of Physics D:Applied Physics,2009,42(03):035008. |
| [13] | Hao Zeng;Shouheng Sun;J. Li;Z. L. Wang;J. P. Liu .Tailoring magnetic properties of core/shell nanoparticles[J].Applied physics letters,2004(5):792-794. |
| [14] | Meiklejohn W H;Bean C P .[J].Physical Review,1956,102(05):1413. |
| [15] | Black C T;Murray C B;Sandstrom R L et al.[J].Science,2000,290:1131-1134. |
| [16] | Gleiter H .[J].Progress in Materials Science,1989,33(04):223-315. |
| [17] | Koch C C .[J].Nano-Structured Materials,1997,9(1-8):13-22. |
| [18] | Tzitzios V;Basina G;Gjoka M;Alexandrakis V;Georgakilas V;Niarchos D;Boukos N;Petridis D .Chemical synthesis and characterization of hcp Ni nanoparticles[J].Nanotechnology,2006(15):3750-3755. |
| [19] | Wang, DP;Sun, DB;Yu, HY;Meng, HM .Morphology controllable synthesis of nickel nanopowders by chemical reduction process[J].Journal of Crystal Growth,2008(6):1195-1201. |
| [20] | Biasi E D;Ramos C A;Zysler R D .[J].Physical Review B,2002,65:144416. |
| [21] | Winkler E;Zysler R D;Mansilla M V et al.[J].Physical Review B,2005,72:132409. |
| [22] | Rajeevan N E;Pradyumnan P P;Kumar R et al.[J].Applied Physics Letters,2008,92:102910. |
| [23] | Ceylan A;Baker C C;Hasanain S K et al.[J].Journal of Applied Physics,2006,100:034301. |
| [24] | Lederman D.;Schuller IK.;Nogues J. .EXCHANGE ANISOTROPY AND THE ANTIFERROMAGNETIC SURFACE ORDER PARAMETER[J].Physical Review.B.Condensed Matter,1997(5):2332-2335. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%