Details

Autor(en) / Beteiligte

• Frenkel, Anatoly I
• Kolobov, Alexander V
• Robinson, Ian K
• Cross, Julie O
• Maeda, Yoshihito
• Bouldin, Charles E

Titel

Direct separation of short range order in intermixed nanocrystalline and amorphous phases

Ist Teil von

• Physical review letters, 2002-12, Vol.89 (28 Pt 1), p.285503-285503, Article 285503

Ort / Verlag

United States

Erscheinungsjahr

2002

Link zum Volltext

Quelle

American Physical Society

Beschreibungen/Notizen

• Diffraction anomalous fine-structure (DAFS) and extended x-ray absorption fine-structure (EXAFS) measurements were combined to determine short range order (SRO) about a single atomic type in a sample of mixed amorphous and nanocrystalline phases of germanium. EXAFS yields information about the SRO of all Ge atoms in the sample, while DAFS determines the SRO of only the ordered fraction. We determine that the first-shell distance distribution is bimodal; the nanocrystalline distance is the same as the bulk crystal, to within 0.01(2) A, but the mean amorphous Ge-Ge bond length is expanded by 0.076(19) A. This approach can be applied to many systems of mixed amorphous and nanocrystalline phases.