研究了空气和真空氛围烧结的溶胶-凝胶制备的Ti0.962Mn0.038O2薄膜的结构和磁学性质.结构测量表明,在空气和真空两种氛围,样品经过500℃烧结,均为单一的锐钛矿相.真空中烧结的样品存在更多的氧空位或结构缺陷.磁性测量表明:在两种氛围烧结的样品均具有室温铁磁性,在真空中烧结的样品的磁性明显强于空气中烧结的样品,前者饱和磁化强度为0.285μB/Mn,后者饱和磁化强度为0.08μB/Mn.实验结果表明氧空位或结构缺陷增多,有利于Mn离子之间通过氧空位或结构缺陷发生铁磁交换作用,从而导致薄膜磁性增强.
参考文献
[1] | Errico L A;Rentería M;Weissmann M .[J].Physical Review B,2005,72:184425. |
[2] | Griffin K A;Pakhomov A B;Wang C M et al.[J].Physical Review Letters,2005,94:157204. |
[3] | Diebold U .[J].Surface Science Reports,2003,48:53-229. |
[4] | Yakovlev V V;Scarel G;Aita C R et al.[J].Applied Physics Letters,2000,76:1107-1109. |
[5] | Bassi A L;Cattaneo D;Russo V et al.[J].Journal of Applied Physics,2005,98:074305. |
[6] | Wang J;Chen W;Wang M R.[J].Journal of Alloys and Compounds,2007 |
[7] | Zhao X;Sakka K;Kihara N et al.[J].Current Applied Physics,2006,6:931-933. |
[8] | Nortona D P;Pearton S J;Hebard A F et al.[J].Applied Physics Letters,2003,82:239-241. |
[9] | Kane M H;Shalini K;Summers C J et al.[J].Journal of Applied Physics,2005,97:023906. |
[10] | Jayakumar O D;Salunke H G;MKadam R et al.[J].Nanotechnology,2006,17:1278-1285. |
[11] | Kittilstved K R;Liu W K;Gamelin D R .[J].Nature Materials,2006,5:291. |
[12] | Coey J M D;Venkatesan O;Fitzgerald C B .[J].Nature Materials,2005,4:173-179. |
[13] | Bergqvist L;Eriksson O;Kudrnovsky J et al.[J].Physical Review Letters,2004,93:137202. |
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