Room-temperature ferromagnetism and terahertz emission of Mn-doped InGaAs and GaAsSb nanowires

被引：9

作者：

Kong, Kang Jun ^{[1
]}

Jung, Chan Su ^{[1
]}

Jung, Gyeong Bok ^{[1
]}

Cho, Yong Jae ^{[1
]}

Kim, Han Sung ^{[1
]}

Park, Jeunghee ^{[1
]}

Yu, Nan Ei ^{[2
]}

Kang, Chul ^{[2
]}

机构：

[1] Korea Univ, Dept Chem, Jochiwon 339700, South Korea

[2] Gwangju Inst Sci & Technol, Adv Photon Res Inst, Kwangju 500712, South Korea

来源：

NANOTECHNOLOGY | 2010年 / 21卷 / 43期

关键词：

D O I：

10.1088/0957-4484/21/43/435703

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ferromagnetic Mn-doped In0.05Ga0.95As and GaAs0.95Sb0.05 nanowires were synthesized by chemical vapor transport and their Mn concentration was about 2%. The Mn doped homogeneously into both the single-crystalline zinc blende InGaAs and GaAsSb without the formation of metal clusters. X-ray magnetic circular dichroism and magnetic moment measurements revealed their distinctive room-temperature ferromagnetic behaviors. While the incorporation of In enhances the ferromagnetism, that of Sb reduces it, which can be ascribed to the increase or decrease of the dopant-acceptor hybridization. These GaAs-based NWs exhibit an efficient terahertz emission at room temperature, due to a strong local field enhancement by coherent surface plasmons. The Mn doping significantly enhances the intensity and bandwidth of the terahertz emission, with an excellent correlation with their magnetization.

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页数：6

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