발간논문

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Vol.14, No.4, 382 ~ 389, 1976
Title
Study on SrO - Fe2O3 System with Solid State Cell by means of EMF Measurement (2) - Mossbauer Effect and Magnetic Property of Sr3Fe2O7 -χ Phase -
이광 Kwang Lee
Abstract
The compounds of Sr₃Fe₂O_(7-X) are prepared by equilibrating prereacted materials at various temperature and oxygen pressure, then M¨ossbauer effect and magnetization are measured at the temperature from 4°K to room temperature. The results obtained in this study are as follows 1) Mo¨ssbauer spectra mean that Sr₃Fe₂O_(7-X) phases are magnetically ordered at 4°K 2) The isomershift of Fe(IV) has the trend towards more negative value as the content of Fe(III) increases 3) Quadrupole splitting of the samples of Sr₃Fe₂O_(6·58) and Sr₃Fe₂O_(6·21) is clearly evident and asociated with oxygen vacancy 4) The samples of Sr₃Fe₂O_(6·85) and Sr₃Fe₂O_(6·58) are antiferromagnetic and its Ne′el temperatures are 120°K and 20°K 5) Sr₂Fe₂O_(6·00) is antiferromagnetic and magnetic ordering appears stable to above room temperature.
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