An Investigation on Magnetic Interacting La0.6Sr0.4MnO3 Nanoparticles

Mohammad Hoseein Ehsani; Parviz Kameli; Mohammad Ebrahim Ghazi; Fereidon Saadat Razavi

doi:10.4028/www.scientific.net/AMR.829.712

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 829An Investigation on Magnetic Interacting...

An Investigation on Magnetic Interacting La_0.6Sr_0.4MnO₃ Nanoparticles

Abstract:

Nanoparticles of La_0.6Sr_0.4MnO₃ (LSMO) with an equivalent average particle size of ~ 20nm were synthesized by nitrate-complex auto-ignition method. The structural and magnetic properties were investigated systematically. The X-Ray diffraction study coupled with the Rietveld refinement of XRD data showed that sample crystallize in a rhombohedral structure with space group of R-3C. The stretching and bending modes in Fourier transform infrared (FTIR) spectroscopy is observed which indicates the formation of the perovskite structure of LSMO. The nature of DC magnetization versus field M(H) plot for sample resembles qualitatively with ferromagnetic (FM) systems. The AC-susceptibility data obtained at different frequencies confirmed the presence of a frequencydependent freezing temperature around room temperature. Based on the interparticle interaction strength and phenomenological models (Neel-Brown, Vogel-Fulcher and Critical slowing down) the magnetic dynamic behavior of nanoparticles was characterized. By fitting the experimental data with mentioned models the possibility existence of superparamagnetic/spin glass states were considered. The obtained values from fitting performance showed that there is a strong interaction between magnetic nanoparticles of LSMO.

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Periodical:

Advanced Materials Research (Volume 829)

Pages:

712-716

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.829.712

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Online since:

November 2013

Authors:

Mohammad Hoseein Ehsani*, Parviz Kameli, Mohammad Ebrahim Ghazi, Fereidon Saadat Razavi

Keywords:

AC Susceptibility, Magnetic Interacting, Manganite, Nanoparticle

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