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Long range charge ordering in magnetite below the Verwey transition.

Abstract:

The crystal structure of Fe(3)O(4) below the 122 K Verwey transition has been refined using high-resolution x-ray and neutron powder diffraction data. The refinements give direct evidence for charge ordering (CO) over four independent octahedral Fe sites, two with a charge of +2.4 and the other two of +2.6. CO schemes consistent with our model do not meet the widely accepted Anderson condition of minimum electrostatic repulsion. Instead we propose that CO is driven primarily by a [001] electr...

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Journal:
Physical review letters
Volume:
87
Issue:
26
Pages:
266401
Publication date:
2001-12-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:a6bd69d2-9287-495f-b312-90d920cce029
Source identifiers:
66272
Local pid:
pubs:66272
Language:
English
Keywords:

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