ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 48, (4) 175 - 179 (2004)


Synthesis and Physical Properties of Ruddlesden-Popper Phase Sr₃Mn2-xFexO7-d (x = 0.15 ∼ 1.0)
 
Song Min-Seok, Kim Suk-Young, Lee Jai-Yeoul
 
School of Metallurgical and Materials Engineering, Center for Materials Research Yeungnam University, 214-1 Daedong Gyongsan Gyoungbuk, 712-749, Korea

Keywords: R-P phase, Layered manganate, Magnetic properties, Spin glass
 

Double layer R–P manganate phases Sr₃Mn₂O7-δ were stabilized by partial substitution of Mn with Fe in air atmosphere. The minimum amount of Fe needed to stabilize single phase of R-P in air atmosphere was about x = 0.15. As the Fe content x increased, the optimum reaction temperatures were lowered from 1530°C for x = 0.15 sample to 1400°C for x = 1.0 sample. The structural parameters were refined on the basis of space group I4/mmm by Rietveld method with powder X-ray diffraction data. Magnetic susceptibility data indicate that these samples have very complicate magnetic properties. It also shows spin-glass like transitions at low temperatures when x was larger than 0.5.


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