DocumentCode
1201459
Title
Structure and magnetic properties of Gd1-xSrxFeO3-δ
Author
Kim, Chul Sung ; Um, Young Rang ; Park, Seung Iel ; Ji, Sang Hee ; Oh, Young Jei ; Park, Jae Yun ; Lee, Sung Joo ; Yo, Chul Hyun
Author_Institution
Dept. of Phys., Kookmin Univ., Seoul, South Korea
Volume
30
Issue
6
fYear
1994
fDate
11/1/1994 12:00:00 AM
Firstpage
4918
Lastpage
4920
Abstract
The perovskite type Gd1-xSrxFeO3-δ (x=0.0, 0.25, 0.5, 0.75 and 1.0) system has been studied by X-rays, Mohr´s salt analysis, and Mossbauer spectroscopy. From the results of X-ray diffraction measurement the structure of the Gd1-xSrxFeO3-δ system is orthorhombic with x values of 0.0, 0.25 and 0.5, and cubic with the x values of 0.75 and 1.0. Mossbauer spectra of Gd1-xSrx FeO3-δ have been taken at various temperatures ranging from 13 to 800 K. Analysis of Mossbauer spectra for this system demonstrated the existence of the mixed valence states of iron and the coordination state of Fe3+ and Fe4+ ions. The Neel temperature decreases linearly with Sr concentration, suggesting that the superexchange interaction for Gd-O-Fe link is stronger than that for Sr-O-Fe link
Keywords
Mossbauer effect; Neel temperature; crystal structure; gadolinium compounds; mixed valence compounds; strontium compounds; superexchange interactions; 13 to 800 K; GdSrFeO3; Mohr´s salt analysis; Mossbauer spectroscopy; Neel temperature; Sr concentration; X-ray diffraction; cubic; mixed valence states; orthorhombic; perovskite; superexchange interaction; IEL; Iron; Magnetic properties; Materials science and technology; Physics; Solids; Spectroscopy; Strontium; Temperature; X-ray diffraction;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.334265
Filename
334265
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