Structure of nanocrystalline MgFe2O4 from X-ray diffraction, Rietveld and atomic pair distribution function analysis

The three‐dimensional structure of nanocrystalline magnesium ferrite, MgFe2O4, prepared by ball milling, has been determined using synchrotron radiation powder diffraction and employing both Rietveld and atomic pair distribution function (PDF) analysis. The nanocrystalline ferrite exhibits a very li...

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Bibliographic Details
Published in:Journal of applied crystallography Vol. 38; no. 5; pp. 772 - 779
Main Authors: Gateshki, Milen, Petkov, Valeri, Pradhan, Swapan K., Vogt, Tom
Format: Journal Article
Language:English
Published: 5 Abbey Square, Chester, Cheshire CH1 2HU, England Munksgaard International Publishers 01.10.2005
Blackwell
Blackwell Publishing Ltd
Subjects:
ball milling
COHERENCE LENGTH
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
DIFFRACTION
DISTRIBUTION FUNCTIONS
Exact sciences and technology
FERRITE
MAGNESIUM
magnesium ferrite
MAGNETIC PROPERTIES
Magnetic properties and materials
MILLING
nanocrystals
national synchrotron light source
pair distribution function
PARTICLE ACCELERATORS
Physics
Rietveld analysis
Structure of solids and liquids; crystallography
Structure of specific crystalline solids
Studies of specific magnetic materials
SYNCHROTRON RADIATION
Theory of crystal structure, crystal symmetry; calculations and modeling
X-RAY DIFFRACTION
Powders
Ball mill
Ions
XRD
Disorder
Ferrites
Coherence length
Three dimensional structure
Spinels
Ordering
Crystallographic site
Magnesium
Pair distribution function
Nanocrystal
Synchrotron radiation
ISSN:1600-5767, 0021-8898, 1600-5767
Online Access:Get full text
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Description
Summary:The three‐dimensional structure of nanocrystalline magnesium ferrite, MgFe2O4, prepared by ball milling, has been determined using synchrotron radiation powder diffraction and employing both Rietveld and atomic pair distribution function (PDF) analysis. The nanocrystalline ferrite exhibits a very limited structural coherence length and a high degree of structural disorder. Nevertheless, the nanoferrite possesses a very well defined local atomic ordering that may be described in terms of a spinel‐type structure with Mg2+ and Fe3+ ions almost randomly distributed over its tetrahedral and octahedral sites. The new structural information helps explain the material's unusual magnetic properties.
Bibliography:ark:/67375/WNG-M0HVTZS9-9
ArticleID:JCRWF5011
istex:98525A512D833C86C4FA766025278B9941D8DE7A
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
BNL-78289-2007-JA
DE-AC02-98CH10886
Doe - Office Of Science
ISSN:1600-5767
0021-8898
1600-5767
DOI:10.1107/S0021889805024477