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Researchers from Saha Institute of Nuclear Physics Discuss Findings in Condensed Matter (Superparamagnetic behavior of nanosized Co0.2Zn0.8Fe2O4...

August 26, 2014



Researchers from Saha Institute of Nuclear Physics Discuss Findings in Condensed Matter (Superparamagnetic behavior of nanosized Co0.2Zn0.8Fe2O4 synthesized by a flow rate controlled chemical coprecipitation method)

By a News Reporter-Staff News Editor at Physics Week -- Research findings on Condensed Matter are discussed in a new report. According to news reporting from Bengal, India, by VerticalNews journalists, research stated, "We have studied the structural, microstructural and magnetic properties of nanosized (similar to 20 nm) Co0.2Zn0.8Fe2O4 synthesized by a flow rate controlled coprecipitation method. The phase purity and crystallinity of the sample have been confirmed by powder X-ray diffraction and high resolution transmission electron microscopic studies."

The news correspondents obtained a quote from the research from the Saha Institute of Nuclear Physics, "According to the results of dc magnetic measurements the sample exhibits superparamagnetic behavior above 70 K due to its nanometric size. This has been corroborated by Mossbauer spectroscopic study at 300 K. The infield Mossbauer spectroscopic study indicates that the sample behaves ferrimagnetically at 10 K and it possesses equilibrium cation distribution. The saturation magnetization of the sample (M-SAT similar to 32 emu g(-1) at 300 K) is substantially lower than its bulk counterpart (M-SAT = 80 emu g(-1)) but higher than those having same composition synthesized by the conventional coprecipitation method. This has been attributed to finite size and spin canting effects as well as good crystalline character and bulk like equilibrium cation distribution of the sample."

According to the news reporters, the research concluded: "We have shown that the flow rate controlled coprecipitation method can produce nanosized ferrites with very good crystalline order and equilibrium cation distribution but they exhibit reduction of magnetization, magnetic order and ordering temperature compared to their bulk counterparts due to spin canting effect and finite size effect."

For more information on this research see: Superparamagnetic behavior of nanosized Co0.2Zn0.8Fe2O4 synthesized by a flow rate controlled chemical coprecipitation method. Physica B-Condensed Matter, 2014;448():247-252. Physica B-Condensed Matter can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

Our news journalists report that additional information may be obtained by contacting S. Dey, Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India. Additional authors for this research include S.K. Dey, S. Majumder, A. Poddar, P. Dasgupta, S. Banerjee and S. Kumar.

Keywords for this news article include: Asia, India, Bengal, Condensed Matter

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Source: Physics Week


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