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

W. Schäfer; W. Kockelmann; A. Kirfel; W. Potzel; F. J. Burghart; G. M. Kalvius; A. Martin; W. A. Kaczmarek; S. J. Campbell

doi:10.4028/WWW.SCIENTIFIC.NET/MSF.321-324.802

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

W. Schäfer, W. Kockelmann, A. Kirfel, W. Potzel, F. J. Burghart, G. M. Kalvius, A. Martin, W. A. Kaczmarek, S. J. Campbell

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	802 - 807
Journal	Materials Science Forum
Volume	321 - 324
DOIs	https://doi.org/10.4028/WWW.SCIENTIFIC.NET/MSF.321-324.802
Publication status	Published - 2000
Event	Sixth European Powder Diffraction Conference (EPDIC 6) - Budapest, Hungary Duration: 22 Aug 1998 → 25 Aug 1998 https://openlibrary.org/authors/OL5440369A/European_Powder_Diffraction_Conference_(6th_1998_Budapest_Hungary)

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title = "Structural and magnetic variations of ZnFe2O4 spinels-neutron powder diffraction studies",

abstract = "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.",

author = "W. Sch{\"a}fer and W. Kockelmann and A. Kirfel and W. Potzel and Burghart, {F. J.} and Kalvius, {G. M.} and A. Martin and Kaczmarek, {W. A.} and Campbell, {S. J.}",

year = "2000",

doi = "10.4028/WWW.SCIENTIFIC.NET/MSF.321-324.802",

language = "English",

volume = "321 - 324",

pages = "802 -- 807",

journal = "Materials Science Forum",

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publisher = "Trans Tech Publications Ltd.",

note = "Sixth European Powder Diffraction Conference (EPDIC 6) ; Conference date: 22-08-1998 Through 25-08-1998",

url = "https://openlibrary.org/authors/OL5440369A/European_Powder_Diffraction_Conference_(6th_1998_Budapest_Hungary)",

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TY - JOUR

T1 - Structural and magnetic variations of ZnFe2O4 spinels-neutron powder diffraction studies

AU - Schäfer, W.

AU - Kockelmann, W.

AU - Kirfel, A.

AU - Potzel, W.

AU - Burghart, F. J.

AU - Kalvius, G. M.

AU - Martin, A.

AU - Kaczmarek, W. A.

AU - Campbell, S. J.

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

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U2 - 10.4028/WWW.SCIENTIFIC.NET/MSF.321-324.802

DO - 10.4028/WWW.SCIENTIFIC.NET/MSF.321-324.802

M3 - Conference article

SN - 0255-5476

VL - 321 - 324

SP - 802

EP - 807

JO - Materials Science Forum

JF - Materials Science Forum

T2 - Sixth European Powder Diffraction Conference (EPDIC 6)

Y2 - 22 August 1998 through 25 August 1998

ER -

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

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