采用射频磁控溅射制备Mn掺杂CuO薄膜样品.X射线衍射结果说明薄膜样品为单相结构且沿(111)取向生长.通过样品的XRD精修得到样品的结构和晶格参数,掺杂后薄膜晶体结构有微小畸变.薄膜的高分辨透射电镜研究证明了对结构和晶粒大小等的精修结果,且同时说明Mn以替代Cu的形式掺入了CuO晶格中.通过对样品M-T曲线的分析,得到样品的居里温度为96.5K,近邻Mn离子之间的耦合为铁磁性,并由居里外斯拟合得到Mn离子的有效磁矩为3.1μB.这说明磁性不是来自于团聚的Mn原子或铜锰的其它氧化物,而很可能来自于替位的锰离子所形成的Mn-O-Cu-O-Mn之间的铁磁性耦合.
参考文献
| [1] | Ohno,H;Chiba,D;Matsukura,F;Omiya,T;Abe,E;Dietl,T;Ohno,Y;Ohtani,K .Electric-field control of ferromagnetism.[J].Nature,2000(6815):944-946. |
| [2] | Furdyna J K .Diluted magnetic semiconductors[J].Journal of Applied Physics,1988,64(04):R29. |
| [3] | Prellier W.;Fouchet A.;Mercey B. .Oxide-diluted magnetic semiconductors: a review of the experimental status [Review][J].Journal of Physics. Condensed Matter,2003(37):R1583-R1601. |
| [4] | Fukumura T;Toyosaki H;Yamada Y .Magnetic oxide semiconductors[J].Semiconductor Science and Technology,2005(4):S103-S111. |
| [5] | Janisch R;Gopal P;Spaldin NA .Transition metal-doped TiO2 and ZnO - present status of the field[J].Journal of Physics. Condensed Matter,2005(27):R657-R689. |
| [6] | Ogale SB.;Choudhary RJ.;Buban JP.;Lofland SE.;Shinde SR.;Kale SN. Kulkarni VN.;Higgins J.;Lanci C.;Simpson JR.;Browning ND.;Das Sarma S.;Drew HD.;Greene RL.;Venkatesan T. .High temperature ferromagnetism with a giant magnetic moment in transparent Co-doped SnO2-delta - art. no. 077205[J].Physical review letters,2003(7):7205-0. |
| [7] | Coey J M D et al.Ferromagnetism in Fe-doped SnO2 thin films[J].Applied Physics Letters,2004,84(08):1332. |
| [8] | Matsmoto Y;Murakami M;Shono T et al.Room-temperature ferromagnetism in transparent transition metaldoped titanium dioxide[J].Science,2001,291:854. |
| [9] | Nguyen Hoa Hong;Joe Sakai;Awatef Hassini .Ferromagnetism at room temperature with a large magnetic moment in anatase V-doped TiO_(2) thin films[J].Applied physics letters,2004(14):2602-2604. |
| [10] | Sohma M;Kawaguchi K;Fujii Y .Magnetic-properties of layered CuO in CuO/Al2O3 and CuO/MgO multilayers[J].Journal of Applied Physics,1995,77(03):1189. |
| [11] | Loram J W et al.Specific-heat evidence for quasi-1d magnetic order in CuO[J].EUROPHYSICS LETTERS,1989,8(03):263. |
| [12] | Rakhshani A E .Preparation,characteristics and photovoltaic properties of cuprous-oxide-a review[J].Solid-State Electronics,1986,29(01):7. |
| [13] | Xu JF;Shen ZX;Tang SH;Ye XR;Jia DZ;Ji W .PREPARATION AND CHARACTERIZATION OF CuO NANOCRYSTALS[J].International Journal of Quantum Chemistry,1999(2):516-519. |
| [14] | Yang S G;Li T;Gu B X et al.Ferromagnetism in Mn-doped CuO[J].Applied Physics Letters,2003,83(18):3746. |
| [15] | Arbuzova;Samokhvalov T I et al.Temperature transition from 3d to quasi-1d antiferromagnetism in CuO single-crystals[J].Journal of Magnetism and Magnetic Materials,1991,95(02):168. |
| [16] | Alessio Filippetti;Vincenzo Fiorentini .Magnetic Ordering in CuO from First Principles: A Cuprate Antiferromagnet with Fully Three-Dimensional Exchange Interactions[J].Physical review letters,2005(8):086405.1-086405.4. |
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%