Ion scattering from the single-crystal magnetite Fe3O4 under the Verwey transition

✍ Scribed by W. Soszka; N-T.H. Kim-Ngan; D. Sitko; G. Jagło; A. Kozłowski

• Book ID: 104266274
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 115 KB
• Volume: 54
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(98)00440-0

✦ Synopsis

Energy spectra of ions scattered from a cleaved surface of a single-crystal Fe O at small scattering angles were investigated. The magnetite Fe O shows the Verwey transition around 120 K corresponding to the transition from dynamic disorder to long-range order in the distribution of Fe> and Fe> ions in octahedral sites. This transition is accompanied by a structural transition from cubic FCC to a monoclinic structure. The ion scattering intensity (I) as well as the ion scattering yields (R>) are found to increase by 1.4 and 1.7 times from 295 to 95 K for Ar> and Ne> ion scattering, respectively. Around the Verwey temperature, a broad minimum followed by a small maximum was observed in the temperature-dependence curve I (¹ ) and R> (¹ ). The observed change in the ion scattering under this transition is due to the increase of the neutralization probability and the change of the target material transparency.