Magnetic Properties and M?ssbauer spectroscopy of NdFe1-xMnxO3

International Conference on Strongly Correlated Electron Systems 2014

Lazurova, J.^1 ; Mihalik, M.^1 ; Mihalik Jr., M.^1 ; Vavra, M.^1 ; Zentkova, M.^1 ; Briancin, J.^2 ; Perovic, M.^3 ; Kusigerski, V.^3 ; Schneeweiss, O.^4 ; Roupcova, P.^4 ; Kamenev, K.V.^5 ; Misek, M.^5 ; Jaglicic, Z.^6

Institute of Experimental Physics, SAS, Watsonova 47, Kosice, Slovakia^1

Institute of Geotechnics, SAS, Watsonova 45, Kosice, Slovakia^2

Vinca Institute, University of Belgrade, Belgrade

11001, Serbia^3

Institute of Physics of Materials, ASCR, V. V. I., Zizkova 22, Brno, Czech Republic^4

CSEC, School of Engineering, University of Edinburgh, Edinburgh, United Kingdom^5

IMPM and FGG, Jadranska 19, Ljubljana

1000, Slovenia^6

关键词: Average particle size;    Ferromagnetic component;    Local environments;    Reduction of dimensionality;    Saturated magnetization;    Spin reorientation;    Ssbauer spectroscopies;    Superparamagnetic particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012117/pdf
DOI  :  10.1088/1742-6596/592/1/012117

来源: IOP

【 摘 要 】

The effect of particle reduction to nanoscale size and substitution of Mn3+ions for Fe3+ions on the crystal structure, lattice dynamics, Mössbauer spectra and magnetic properties in NdFe1-xMnxO3compounds have been studied. X-ray powder diffraction and Raman spectroscopy revealed that the Jahn-Teller distortion of lattice dominates for samples with x > 0.4. The average particle size of NdFeO3nanoparticles (NAP) increases with annealing at 600°C from about 15 nm to 25 nm. The presence of superparamagnetic particles was indicated by Mössbauer measurements in NdFeO3NAP system. Sextets in NdFe1-xMnxO3Mössbauer spectra can be modelled with several local environments of Fe3+induced by substitution. The reduction of dimensionality and the substitution induce a decrease of the Néel temperature TN1from 691 K to 544 K for NAP or to 356 K for x 0.4, however the temperature of spin reorientation TSRincreases with substitution. The saturated magnetization obtained at 1.9 K increases and ferromagnetic component is removed below TSRwith the substitution.