Structure and magnetic properties of Gd/sub 1-x/Sr/sub x/FeO/sub 3-/spl delta

The perovskite type Gd/sub 1-x/Sr/sub x/FeO/sub 3-/spl delta// (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 Gd/sub 1-x/Sr/sub x/FeO/sub 3-/spl delta//...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 30; no. 6; pp. 4918 - 4920
Main Authors Chul Sung Kim, Young Rang Um, Seung Iel Park, Sang Hee Ji, Young Jei Oh, Jae Yun Park, Sung Joo Lee, Chul Hyun Yo
Format Journal Article
LanguageEnglish
Published IEEE 01.11.1994
Subjects
IEL
Iron
Magnetic properties
Materials science and technology
Physics
Solids
Spectroscopy
Strontium
Temperature
X-ray diffraction
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Summary:The perovskite type Gd/sub 1-x/Sr/sub x/FeO/sub 3-/spl delta// (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 Gd/sub 1-x/Sr/sub x/FeO/sub 3-/spl delta// 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 Gd/sub 1-x/Sr/sub x/FeO/sub 3-/spl delta// 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 Fe/sup 3+/ and Fe/sup 4+/ 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.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.334265