Structural and magnetic characterization of Ge0.99Mn0.01 nanowire arrays

被引：37

作者：

Kulkarni, JS

Kazakova, O

Erts, D

Morris, MA

Shaw, MT

Holmes, JD ^{[1
]}

机构：

[1] Natl Univ Ireland Univ Coll Cork, Dept Chem, Mat Sect & Supercrit Fluid Ctr, Cork, Ireland

[2] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[3] Intel Ireland, Kildare, Ireland

[4] Latvian State Univ, Inst Chem Phys, LV-1586 Riga, Latvia

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 14期

关键词：

D O I：

10.1021/cm050352a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A supercritical fluid inclusion-phase technique has been developed to embed Ge0.99Mn0.01 nanowires, with size-monodisperse diameters, within the pores of anodized aluminum oxide hosts. This article describes the synthesis and structural and magnetic characterization of these nanocomposite materials. The experimental results indicate the presence of both para- and ferromagnetic phases in Ge0.99Mn0.01 nanowires. Paramagnetism could be related to individual Mn atoms in the nanowire core. The ferromagnetic phase yields a high Curie temperature, T-c > 300 K, which is surprisingly high for this class of materials. Extended X-ray atomic fine structure (EXAFS) analysis confirmed that the ferromagnetism observed originates from the manganese atoms located at the nanowire-membrane interface.

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页码：3615 / 3619

页数：5

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