کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1801415 | 1524897 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetic susceptibility of Alq3 powder, pure and Al-doped 8-hydroxyquinoline Magnetic susceptibility of Alq3 powder, pure and Al-doped 8-hydroxyquinoline](/preview/png/1801415.png)
Single-crystal nanowires several microns long and 100–200 nm in diameter were grown by physical vapour deposition from mixed Alq3/γ-Al2O3 powder. The crystals are orthorhombic Al-doped 8-hydroxyquinoline. The molar susceptibility is −3×10−9 at room temperature, and it shows a Curie-law upturn below about 50 K. The approach to saturation at low temperature indicates a density of S=12 defects 4×10−4 per formula unit. Pure 8-hydroxyquinoline and aluminium (Alq3) behave similarly. Pressed pellets exhibit much increased paramagnetic susceptibility due to iron ions scavanged from the steel die. Subsequent melting of these samples produces a ferromagnetic signal of order 0.01 A m2 kg−1, which is attributed to metallic iron nanoclusters in the organic material.
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issues 9–12, May–June 2010, Pages 1255–1258