Title :
Effect of Annealing Temperature to Oxidation State of Sr2FeMoO6 Double Perovskite Film
Author :
Handoko, D. ; Lee, S.-H. ; Kalanda, N.A. ; Yu, S.-C. ; Oh, S.K. ; Kim, D.-H. ; Yang, D.S. ; Petrov, A.V. ; Yarmolich, M.V. ; Demyanov, S.E.
Author_Institution :
Dept. of Phys., Chungbuk Nat. Univ., Cheongju, South Korea
Abstract :
We report our investigation on structural and magnetic properties of double perovskite Sr2FeMoO6 (SFMO) films fabricated at different annealing temperatures. Structural properties have been investigated by means of X-ray absorption near-edge spectra and extended X-ray fine structure, where a change of oxidation state has been observed depending on the annealing temperature. It is found that the oxidation state becomes more deficient for a lower annealing temperature, indicating a lower number of unoccupied Fe states with decreasing Mo coordination number. Ordering degree of Fe and Mo ions in SFMO films is found to strongly correlate to the oxidation state, resulting in the subsequent magnetic property change.
Keywords :
EXAFS; XANES; annealing; iron compounds; magnetic thin films; oxidation; sputter deposition; strontium compounds; Mo coordination number; Sr2FeMoO6; X-ray absorption near-edge spectra; annealing temperature effect; double perovskite film; extended X-ray fine structure; magnetic properties; oxidation state; structural properties; unoccupied Fe states; Absorption; Annealing; Films; Iron; Magnetic properties; Oxidation; Temperature measurement; Double perovskite (DP); EXAFS; X-ray absorption near-edge spectra (XANES); XANES; double perovskite; extended X-ray fine structure (EXAFS); oxidation state;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2446506
