采用直流磁控溅射技术,在n-Si (100)衬底上制备了CoxC100-x(x=2.5～50,at％)颗粒膜,并对薄膜的结构、形貌、磁性能和巨磁电阻(GMR)效应做了系统的研究.结果表明:制备态的Co-C薄膜为非晶结构,且表面光滑、颗粒尺寸及膜厚度均匀；随热处理温度的增加,Co成分在300℃逐渐开始晶化,400℃基本晶化完全,500℃度的时候膜层开始出现裂纹；拉曼光谱显示制备态薄膜为类金刚石(DLC)薄膜；X射线光电子能谱(XPS)分析表明,包埋在碳基薄膜中的Co掺杂纳米颗粒以单质形态存在,没有Co的碳化物出现,且Co掺杂没有促进碳膜的石墨化,Co-C纳米复合薄膜组成了一个互不相溶的金属/绝缘体体系；磁性能测试显示薄膜的饱和磁化强度(Ms)和矫顽力(Hc)与Co的含量和颗粒的晶化程度有密切关系；磁电阻测量结果表明Co2.5C97.5薄膜具有高达36％的正GMR效应,GMR效应遵循输运通道的转变机制.
参考文献
| [1] | Hastas N A;Dimitriadis C A;Tassis D H et al.[J].Applied Physics Letters,2001,79:638. |
| [2] | Konofaos N;Angelis C T;Evangelou E K et al.[J].Applied Physics Letters,2001,79:2381. |
| [3] | Konofaos N;Evangelou E;Logothetidis S .[J].Journal of Applied Physics,1999,86:4446. |
| [4] | Babonneau D;Briatico J;PetroffF et al.[J].Journal of Applied Physics,2000,87:3432. |
| [5] | Denardin J C;Brandl A L;Knobel M et al.[J].Physical Review B:Condensed Matter,2002,65:064,422. |
| [6] | Asakura S.;Ishio S.;Okada A.;Saito H. .Magnetic domain percolation of COx(SiO2)(100-x) granular films[J].Journal of Magnetism and Magnetic Materials,2002(1/3):485-487. |
| [7] | Pauleau Y;Thiery E;Uglov V;Anishchik V;Kuleshov AK;Samtsov MP .Tribological properties of copper/carbon films formed by microwave plasma-assisted deposition techniques[J].Surface & Coatings Technology,2004(0):102-107. |
| [8] | Hioki T;Itoh Y;Itoh A et al.[J].Surface and Coatings Technology,1991,46:233. |
| [9] | He J H;Kunitake T;Nakao A .[J].Chemical Communications,2004,4:410. |
| [10] | Rusil E;Yoon S F;Huang Q F et al.[J].Journal of Applied Physics,2000,88:3699. |
| [11] | Wu WY.;Ting JM. .Growth and characteristics of carbon films with nano-sized metal particles[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2002(0):166-171. |
| [12] | Ting J M;Lee H .[J].Diamond and Related Materials,2002,11:1119. |
| [13] | Murzina T V;Kapra R V;Aktsipetrov O A et al.[J].Applied Physics Letters,2003,83:4749. |
| [14] | Bewilogua K;Cooper C V;Specht C et al.[J].Surface and Coatings Technology,2000,127:223. |
| [15] | Meng WJ.;Gillispie BA. .Mechanical properties of Ti-containing and W-containing diamond-like carbon coatings[J].Journal of Applied Physics,1998(8):4314-4321. |
| [16] | Tian P;Zhang X;Xue Q Z .[J].Carbon,2007,45:1764. |
| [17] | Zhu D D;Zhang X;Xue Q Z .[J].Journal of Applied Physics,2004,95:1906. |
| [18] | Wan C H;Zhang X Z;Vanacken J et al.[J].IEEE Transactions on Magnetics,2011,47(10):2732. |
| [19] | Wan Shanhong;Wang Liping;Xue Qunji .[J].Electrochemistry Communications,2009,11:99. |
| [20] | Konno T J;Sinclair R .[J].Acta Metallurgica Et Materialia,1994,42:1231. |
| [21] | Hayashi T;Hirono S;Tomita M et al.[J].Nature,1996,381:772. |
| [22] | Mi WB.;Guo L.;Jiang EY.;Li ZQ.;Wu P.;Bai HL. .Structure and magnetic properties of facing-target sputtered Co-C granular films[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2003(19):2393-2399. |
| [23] | Ferrari A C .[J].Robertson J Phys Rev B,2000,61:14,095. |
| [24] | Riedo E;Comin F;Chevrier J et al.[J].Surface and Coatings Technology,2000,125:124. |
| [25] | Cullity B D;Graham C D.Introduction to Magnetic Materials[M].New Jersey:IEEE/Wiley,2009:360. |
| [26] | Tang J;Dai J;Wang K et al.[J].Journal of Applied Physics,2002,91(10):8411. |
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