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Crystallite size dependence on the magnetic properties of nanocrystalline magnetite powders
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UNSPECIFIED (1997) Crystallite size dependence on the magnetic properties of nanocrystalline magnetite powders. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 176 (2-3). L89-L92.
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Abstract
Single phase magnetite powders with crystallite sizes ranging from 8-50 nm were synthesised and studied using X-ray diffraction and Mossbauer spectroscopy. Lattice parameters were seen to decrease at very small crystallite sizes. Quadrupole splitting of the B sites increased with decreasing crystallite size before the spectrum collapsed into a doublet at the smallest sizes. These observations have been explained in terms of high surface-to-volume ratios in the small nanocrystals creating excessive lattice strain and large electric field gradients. (C) 1997 Elsevier Science B.V. All rights reserved.
Item Type: | Journal Item | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
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Journal or Publication Title: | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0304-8853 | ||||
Official Date: | December 1997 | ||||
Dates: |
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Volume: | 176 | ||||
Number: | 2-3 | ||||
Number of Pages: | 4 | ||||
Page Range: | L89-L92 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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