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2014 | 126 | 1 | 138-139
Article title

Structure of Iron Oxide Nanoparticles Studied by ^{57}Fe NMR

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EN
Abstracts
EN
In this work we apply nuclear magnetic resonance (NMR) spectroscopy of ^{57}Fe nuclei for investigation of submicron and nanocrystalline iron oxide systems. The studied iron oxide particles are obtained from ferrous hydroxide gels (prepared from FeCl_{2} and KOH) by aging at elevated temperatures (90 °C) with KNO_{3} as oxidant. The ^{57}Fe NMR spectra of the samples are measured in temperature range 4.2-370 K in a zero external magnetic field. Signals of ^{57}Fe nuclei assigned to tetrahedral and octahedral iron sites are well resolved. The NMR spectra and their temperature dependences are compared with those of stoichiometric and nonstoichiometric magnetite single crystals, as well as with samples of maghemite.
Keywords
EN
Contributors
author
  • Charles University in Prague, Faculty of Mathematics and Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
author
  • Charles University in Prague, Faculty of Mathematics and Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
  • Charles University in Prague, Faculty of Mathematics and Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
  • Charles University in Prague, Faculty of Mathematics and Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
author
  • Innovent e.V. Technologieentwicklung, Prüssingstr. 27 B, D-07745 Jena, Germany
author
  • Innovent e.V. Technologieentwicklung, Prüssingstr. 27 B, D-07745 Jena, Germany
References
  • [1] P. Novák, H. Štěpánková, J. Englich, J. Kohout, V.A.M. Brabers, Phys. Rev. B 61, 1256 (2000), doi: 10.1103/PhysRevB.61.1256
  • [2] T.J. Bastow, A. Trinchi, Solid State Nucl Magn Reson. 35, 25 (2009), doi: 10.1016/j.ssnmr.2008.10.005
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  • [5] H. Štěpánková, K. Kouřil, V. Chlan, P. Görnert, R. Müller, J. Štěpánek, J. Magn. Magn. Mater. 322, 1323 (2010), doi: 10.1016/j.jmmm.2009.04.002
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Document Type
Publication order reference
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bwmeta1.element.bwnjournal-article-appv126n1065kz
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