0472654 - ÚFM 2017 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Lazurová, J. - Mihálik, M. - Mihálik, M. Jr. - Vavra, M. - Zentková, M. - Briančin, J. - Petrovič, M. - Kusigerski, V. - Schneeweiss, Oldřich - Roupcová, Pavla - Kameněv, J. V. - Misek, M. - Jagličić, Z.
Magnetic Properties and Mossbauer spectroscopy of NdFe(1-x)MnxO(3).
INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014). Bristol: IOP PUBLISHING LTD, 2015, č. článku 012117. Journal of Physics Conference Series, 592. ISSN 1742-6588.
[SCES2014 - International Conference on Strongly Correleted Electron Systems. Grenoble (FR), 07.07.2014-14.07.2014]
Institucionální podpora: RVO:68081723
Klíčová slova: NDFEO3 * TEMPERATURE * Mössbauer spectroscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
DOI: https://doi.org/10.1088/1742-6596/592/1/012117

The effect of particle reduction to nanoscale size and substitution of Mn3+ ions for Fe3+ ions on the crystal structure, lattice dynamics, Mossbauer spectra and magnetic properties in NdFe(1-x)MnxO(3) compounds 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 NdFeO3 nanoparticles (NAP) increases with annealing at 600 degrees C from about 15 nm to 25 nm. The presence of superparamagnetic particles was indicated by Mossbauer measurements in NdFeO3 NAP system. Sextets in NdFe(1-x)MnxO(3) Mssbauer 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 Neel temperature T-Nl from 691 K to 544 K for NAP or to 356 K for x = 0.4, however the temperature of spin reorientation T-SR increases with substitution. The saturated magnetization obtained at 1.9 K increases and ferromagnetic component is removed below T-SR with the substitution.
Trvalý link: http://hdl.handle.net/11104/0269898