采用化学方法制备了名义组分为Zn0.993Mn0.007O的Mn掺杂ZnO稀磁半导体材料,并研究了退火温度(Ts＝400,600,800℃)对其结构和磁性的影响.结果表明:在退火温度低于600℃条件下,合成的样品为单一纤锌矿结构的ZnO颗粒材料;当退火温度为800℃时,合成的样品中除了纤锌矿结构ZnO外还观察到ZnMnO3第二相的存在.磁性研究表明:经过600℃退火后的样品,其室温铁磁性最强,而经过800℃退火后的样品,其铁磁性几乎消失,并表现为增强的顺磁性.结合对样品的Raman光谱和紫外-可见吸收光谱的分析,表明Mn元素进入了ZnO晶格中并替代了ZnO中的Zn离子. 样品的室温铁磁性是源于(Zn,Mn)O的本征特性,并排除了样品中第二相导致其具有室温铁磁性的可能性.
参考文献
| [1] | DIEL T;OHNO H;MATSUKURA F .Zener model description of ferromagnetism in zinc-blende magnetic semiconductors[J].Science,2000,287:1019-1022. |
| [2] | 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. |
| [3] | FUKUMURA T;JIN Z;KAWASAKI M et al.Magnetic properties of Mn-doped ZnO[J].Applied Physics Letters,2001,78:958-960. |
| [4] | Liu XC;Shi EW;Chen ZZ;Zhang HW;Zhang T;Song LX .Difference in magnetic properties between Co-doped ZnO powder and thin film[J].Chinese physics,2007(6):1770-1775. |
| [5] | Jih-Jen Wu;Sai-Chang Liu;Ming-Hsun Yang .Room-temperature ferromagnetism in well-aligned Zn_(1-x)Co_(x)O nanorods[J].Applied physics letters,2004(6):1027-1029. |
| [6] | Parmanand Sharma;Amita Gupta;Amita Gupta;K.V.Rao;Frank J.Owens;Renu Sharma;Rajeev Ahuja;J.M.Osorio Guillen;Borje Johansson;G.A.Gehring .Ferromagnetism above room temperature in bulk and transparent thin films of Mn-doped ZnO[J].Nature materials,2003(10):673-677. |
| [7] | Darshan C.Kundaliya;S.B.Ogale;S.E.Lofland .On the origin of high-temperature ferromagnetism in the low-temperature-processed Mn-Zn-O system[J].Nature materials,2004(10):709-714. |
| [8] | Zhang HW;Shi EW;Chen ZZ;Liu XC;Xiao B .Magnetism in Zn1-xMnxO crystal prepared by hydrothermal method[J].Solid State Communications,2006(5):272-274. |
| [9] | LEE J H;JEONG Y S;CHO R C et al.Study of diluted magnetic semiconductor:Co-doped ZnO[J].Applied Physics Letters,2002,81:4020-4022. |
| [10] | Jung H. Park;Min G. Kim;Hyun M. Jang;Sangwoo Ryu;Young M. Kim .Co-metal clustering as the origin of ferromagnetism in Co-doped ZnO thin films[J].Applied physics letters,2004(8):1338-1340. |
| [11] | RUBI D;CALLEJA A;ARBIOL J et al.Structural and magnetic properties of ZnO:TM (TM:Co,Mn) nanopowders[J].Journal of Magnetism and Magnetic Materials,2007,316:E211-E214. |
| [12] | Lawes G;Risbud AS;Ramirez AP;Seshadri R .Absence of ferromagnetism in Co and Mn substituted polycrystalline ZnO[J].Physical review, B. Condensed matter and materials physics,2005(4):5201-1-5201-5-0. |
| [13] | GARCIA A M;RUIZ G L M;QUESADA A et al.Interface double-exchange ferromagnetism in the Mn-Zn-O system:New class of biphase magnetism[J].Physical Review Letters,2005,94:217206-217209. |
| [14] | ZHANG T;SONG X L;CHEN Z Z et al.Origin of ferromagnetism of (Co,Al)-codoped ZnO from first-principles calculations[J].Applied Physics Letters,2006,89:172502-172504. |
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%