利用溶液腐蚀法制备了Mn2+、Ni2+、Fe3+、Cu2+离子掺杂的ZnO基稀磁半导体.XRD表明掺杂后的ZnO仍然保持单一的纤锌矿结构,没有任何杂质相产生.由紫外-可见光反射谱可知掺杂后吸收边发生了红移.掺杂前ZnO的带隙为3.20eV,对样品分别掺入Mn、Ni、Fe和Cu后的带隙分别为3.19eV、3.15eV、3.08eV和3.17eV.掺杂后样品的室温PL谱除了紫外发射峰外,对于Mn掺杂的样品还在蓝光区域出现了2个分别位于424nm和443nm的发射峰,Fe掺杂的样品出现了一个位于468nm的微弱发射峰,Cu掺杂的样品出现了位于469nm及535nm的很宽的发射峰.室温磁滞回线显示掺杂后样品有明显的铁磁性,掺入Mn、Ni、Fe和Cu样品的剩余磁化强度(Ms)分别为0.3902×10-3 emu/cm3、0.454emu/cm3、0.372emu/cm3和0.962×10-3emu/cm3,矫顽力分别为47Oe、115.92Oe、99.33Oe和23Oe.经分析室温铁磁性来源于缺陷调制的Mn2+-Mn2+长程铁磁交换相互作用.
参考文献
| [1] | Shapira Y;Oliveira N F .High-field magnetization steps and the nearest-neighbor exchange constant in Cd1-xMnxS,Cd1-xMnxTe,and Zn1-xMnxSe[J].Physical Review B,1987,35(13):6888. |
| [2] | Foner S;Shapira Y;Heiman D et al.Magnetization steps in dilute magnetic semiconductors to 55-TMn2+ pair saturation in Cd1-x MnxTe and steps in Zn1-xMnxSe,Zn1-x-MnxTe,and Cd1-xMnxSe[J].Physical Review B,1989,39:11793. |
| [3] | Mauger;Escorne M .Transport-properties and spin disorder in the degenerate freeo-spin-glass Sn1-xMnxTe[J].Physical Review B,1987,35(04):1902. |
| [4] | Eltink S J E A;Swagten H J M;Stoffels N M J et al.Correlation between electronic and magnetic properties in the Ⅳ-Ⅵ group diluted magnetic semiconductor SnMnTe[J].Journal of Magnetism and Magnetic Materials,1990,83(1-3):483. |
| [5] | Denissen C J M;Nishihara H;Vangool J C et al.Magnetic-behavior of the semimagnetic semiconductor (Cd1-x-Mnx)3As2[J].Physical Review B,1986,33(11):7637. |
| [6] | Munekata H;Ohno H;Vonmolnar S et al.Diluted magnetic Ⅲ-V semiconductors[J].Physical Review Letters,1989,63(17):1849. |
| [7] | Sato K.;Katayama-Yoshida H. .Material design for transparent ferromagnets with ZnO-based magnetic semiconductors[J].Japanese journal of applied physics,2000(6B):L555-L558. |
| [8] | WangJ B;HuangGJ;ZhongX L et al.Ramanscattering and high temperature ferromagnetism of Mn-doped ZnO nanoparticles[J].Applied Physics Letters,2006,88:252502. |
| [9] | Liu X X;Lin F T;Sun L L et al.Doping concentration dependence of room-temperature ferromagnetism for Nidoped ZnO thin films prepared by pulsed-laser deposition[J].Applied Physics Letters,2006,88:062508. |
| [10] | Xiaolang Chen;Zuowan Zhou;Kai Wang;Ximei Fan;Shuchun Hu;Yong Wang;Yan Huang .Ferromagnetism In Fe-doped Tetra-needle Like Zno Whiskers[J].Materials Research Bulletin,2009(4):799-802. |
| [11] | Li J;Chen Z;Wang X X et al.A novel two-dimensional mercury antimony fluoride:Low temperature synthesis ans characterization of RbHgSbTe3[J].Journal of Alloys and Compounds,1997,28:262. |
| [12] | Bylsma R B;Beeker W M;Kossut J et al.Dependence of energy gap n x and T in Zn1-xMnxSe:The role of exchange interacton[J].Physical Review B,1986,33:207. |
| [13] | Wang DD;Yang JH;Yang LL;Zhang YJ;Lang JH;Gao M .Morphology and photoluminescence properties of ZnO nanostructures fabricated with different given time of Ar[J].Crystal Research and Technology: Journal of Experimental and Industrial Crystallography,2008(10):1041-1045. |
| [14] | Vanheusden K;Seager CH;Warren WL;Tallant DR;Caruso J;HampdenSmith MJ;Kodas TT .Green photoluminescence efficiency and free-carrier density in ZnO phosphor powders prepared by spray pyrolysis[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,1997(1):11-16. |
| [15] | Bagnall DM.;Shen MY.;Zhu Z.;Goto T.;Yao T.;Chen YF. .Room temperature excitonic stimulated emission from zinc oxide epilayers grown by plasma-assisted MBE[J].Journal of Crystal Growth,1998(0):605-609. |
| [16] | Mo MS.;Shao MW.;Hu HM.;Yang L.;Yu WC.;Qian YT. .Growth of single-crystal PbS nanorods via a biphasic solvothermal interface reaction route[J].Journal of Crystal Growth,2002(3/4):364-368. |
| [17] | Liang JB;Liu JW;Xie Q;Bai S;Yu WC;Qian YT .Hydrothermal growth and optical properties of doughnut-shaped ZnO microparticles[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2005(19):9463-9467. |
| [18] | XU Pengshou,Sun Yuming,Shi Chaoshu,XU Faqiang,Pan Haibin.Electronic structure of ZnO and its defects[J].中国科学A辑(英文版),2001(09):1174-1181. |
| [19] | J.M.D.COEY;M.VENKATESAN;C.B.FITZGERALD .Donor impurity band exchange in dilute ferromagnetic oxides[J].Nature materials,2005(2):173-179. |
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%