KIM, CS UM, YR PARK, SI JI, SH OH, YJ PARK, JY LEE, SJ YO, CH 2024-01-21T21:31:06Z 2024-01-21T21:31:06Z 2021-09-02 1994-11 0018-9464 https://pubs.kist.re.kr/handle/201004/145474 The perovskite type Gd1-xSrxFeO3-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 Gd1-xSrxFeO3-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 Gd1-xSrxFeO3-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 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. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC MOSSBAUER STRUCTURE AND MAGNETIC-PROPERTIES OF GD1-XSRXFEO3-DELTA COMPOUNDS Article 1 IEEE TRANSACTIONS ON MAGNETICS, v.30, no.6, pp.4918 - 4920 IEEE TRANSACTIONS ON MAGNETICS 30 6 4918 4920 scie scopus A1994PU42900364 2-s2.0-0028546966 Engineering, Electrical & Electronic Physics, Applied Engineering Physics Article MOSSBAUER perovskite type M"ossbauer spectra mixed valence state coordination state Neel temperature