Evidence for the Verwey transition in highly nonstoichiometric nanometric Fe-based ferrites - art. no. 012402

Citation
N. Guigue-millot et al., Evidence for the Verwey transition in highly nonstoichiometric nanometric Fe-based ferrites - art. no. 012402, PHYS REV B, 6401(1), 2001, pp. 2402
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
0163-1829 → ACNP
Volume
6401
Issue
1
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010701)6401:1<2402:EFTVTI>2.0.ZU;2-5
Abstract
The nanometric scale allows an investigation of the Verwey transition: the impact of varying degree of oxidation of Fe cations on this transition was studied by means of zero-field-cooled superconducting quantum interference device measurements in nanometric highly nonstoichiometric particles of pur e and Ti-substituted magnetite synthesized using soft chemistry route. It i s clearly shown that (i) there is a shift of the transition towards higher temperatures for nanometer scaled compounds and (ii) the amplitude, the tem perature, and the order of the transition are only depending on the number of Fe'2+/Fe3+ pairs in octahedral coordination.