Ayub, I.; Berry, F. and Helgason, O.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1023/A:1021274812398|
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Fe-57 Mossbauer spectra recorded in situ in vacuo from chromium- and gallium-doped Fe3O4 at elevated temperatures show the dopant ions to depress the Curie temperature of Fe3O4 by ca. 70 K. Spectra recorded from aluminium-doped. gamma-Fe2O3 show the onset of conversion to aluminium-doped alpha-Fe2O3 to begin at ca. 750 K, which is ca. 100 K above the conversion temperature for undoped. gamma-Fe2O3. The variation in magnetic hyperfine fields at temperatures exceeding ca. 750 K is similar to that recorded from alpha-Fe2O3 when doped with zinc or magnesium. At temperatures exceeding 900 K the zinc doped alpha-Fe2O3 partially converts to spinel-related ZnFe2O4.
|Item Type:||Journal Article|
|Extra Information:||Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.|
|Academic Unit/Department:||Science > Life, Health and Chemical Sciences
|Depositing User:||David Shuker|
|Date Deposited:||09 Nov 2006|
|Last Modified:||14 Jan 2016 16:16|
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