ISOLDE Solid State Physics
Published April 25, 2023 | Version v1
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Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

Authors/Creators

  • 1. European Organization for Nuclear Research (CERN), CH-1211 Geneva, Switzerland
  • 2. School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4001, South Africa
  • 3. Physics Department, Durban University of Technology, Durban 4000, South Africa
  • 4. Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany
  • 5. Departmento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Plaza de Ciencias 1, 28040 Madrid, Spain
  • 6. Institute of Solid State Electronics and Center for Micro- and Nanostructures, Technische Universität Wien, 1040 Vienna, Austria
  • 7. School of Physics, University of the Witwatersrand, Wits 2050, South Africa
  • 8. Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavík, Iceland
  • 9. Department of Applied Physics, School of Engineering Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 San Sebastian, Spain
  • 10. Quantum Materials Group, Institute for Semiconductor and Solid State Physics, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria
  • 11. Chair Materials for Electrical Engineering and Electronics, Institute of Materials Science and Engineering, Institute of Micro and Nanotechnologies MacroNano®, TU Ilmenau, Gustav-Kirchhoff-Strasse 5, 98693 Ilmenau, Germany
  • 12. Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, D-55099 Mainz, Germany

Description

Experimental data of the following manuscript:

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

Heiniger-Schell, J.; Bharuth-Ram, K.; Naicker, K.; Masondo, V.; Dang, T.T.; Escobar, M.; Díaz-Guerra, C.; Marschick, G.; Masenda, H.; Gunnlaugsson, H.P.; et al. Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy. Crystals 2023, 13, 724. https://doi.org/10.3390/ cryst13050724

 

Abstract

Emission 57Fe Mössbauer spectroscopy (eMS), following the implantation of radioactive 57Mn+ ions, has been used to study the temperature dependence of the hyperfine magnetic field at Fe sites in Ba-doped BiFeO3 (BFO) thin films. 57Mn β decays (t1/2 = 90 s) to the 14.4 keV Mössbauer state of 57Fe, thus allowing online eMS measurements at a selection of sample temperatures during Mn implantation. The eMS measurements were performed on two thin film BFO samples, 88 nm and 300 nm thick, and doped to 15% with Ba ions. The samples were prepared by pulsed laser deposition on SrTiO3 substrates. X-ray diffraction analyses of the samples showed that the films grew in a tetragonal distorted structure. The Mössbauer spectra of the two films, measured at absorber temperatures in the range 301 K–700 K, comprised a central pair of paramagnetic doublets and a magnetic sextet feature in the wings. The magnetic component was resolved into (i) a component attributed to hyperfine interactions at Fe3+ ions located in octahedral sites (Bhf); and (ii) to Fe3+ ions in implantation induced lattice defects, which were characterized by a distribution of the magnetic field BDistr. The hyperfine magnetic field at the Fe probes in the octahedral site has a room temperature value of Bhf = 44.5(9) T. At higher sample temperatures, the Bhf becomes much weaker, with the Fe3+ hyperfine magnetic contribution disappearing above 700 K. Simultaneous analysis of the Ba–BFO eMS spectra shows that the variation of the hyperfine field with temperature follows the Brillouin curve for S = 5/2.

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Related works

Is published in
Journal article: 10.3390/cryst13050724 (DOI)

Funding

European Commission
EURO-LABS - EUROpean Laboratories for Accelerator Based Science 101057511