Structural and magnetic variations of ZnFe2O4 spinels-neutron powder diffraction studies

被引：22

作者：

Schäfer, W ^{[1
]}

Kockelmann, W

Kirfel, A

Potzel, W

Burghart, FJ

Kalvius, GM

Martin, A

Kaczmarek, WA

Campbell, SJ

机构：

[1] Univ Bonn, Mineral Petrol Inst, DE-53115 Bonn, Germany

[2] Tech Univ Munich, Phys Dept E15, DE-85747 Garching, Germany

[3] Univ Jena, Chem Geowissensch Fak, DE-07743 Jena, Germany

[4] Australian Natl Univ, Dept Appl Math, Canberra, ACT 0200, Australia

[5] Univ New S Wales, Univ Coll, Sch Phys, Canberra, ACT 2600, Australia

来源：

EUROPEAN POWDER DIFFRACTION, PTS 1 AND 2 | 2000年 / 321-3卷

关键词：

ZnFe2O4; spinel structure; magnetic order; neutron diffraction;

D O I：

10.4028/www.scientific.net/MSF.321-324.802

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Variations of the structural and magnetic properties of three chemically identical but differently treated ZnFe2O4 compounds have been studied by neutron powder diffraction. The three ZnFe2O4 samples comprise two compacted specimens - (1) annealed and slowly cooled and (2) annealed and quenched - and (3) nanocrystalline material. Unit cells and oxygen positions of their cubic spinel-type structure as well as inversion parameters x defining the occupations of tetrahedrally and octahedrally coordinated cation sites have been refined. Distinct magnetic properties of the three specimens are related to the degree of inversion: (1) antiferromagnetic long range order below 10.5 K, (2) absence of any long range order, (3) onset of ferromagnetic ordering at 500 K.

引用

页码：802 / 807

页数：6

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