Evidence for the Verwey transition in highly nonstoichiometric nanometric Fe-based ferrites

被引：40

作者：

Guigue-Millot, N

Keller, N

Perriat, P

机构：

[1] Univ Bourgogne, LRRS, UMR 5613, CNRS, F-21078 Dijon, France

[2] UVSQ CNRS, LMOV, UMR 8634, F-78035 Versailles, France

[3] Inst Natl Sci Appl, GEMPPM, F-69621 Villeurbanne, France

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.64.012402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 pure and Ti-substituted magnetite synthesized using soft chemistry route. It is clearly shown that (i) there is a shift of the transition towards higher temperatures for nanometer scaled compounds and (ii) the amplitude, the temperature, and the order of the transition are only depending on the number of Fe'2+/Fe3+ pairs in octahedral coordination.

引用

页码：124021 / 124024

页数：4

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