Thien Thanh Dang
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany)
This work presents the study of the coupling between the local electric and magnetic fields in multiferroic bismuth ferrite (BiFeO3 or BFO) using Time Differential Perturbed Angular Correlation (TDPAC) spectroscopy. The measurements were carried out below the Néel temperature TN (643 K), after the implantation of the 111In (111Cd) probe. The TDPAC spectra display the coupling between the electric and magnetic interaction, which is consistent with the spectra generated from the accepted theoretical models found in the literature. The temperature dependence of the quadrupole frequency observed close to magnetic transition temperature shows anomalous behaviour, whereas the magnetic dipole frequency decreases with increasing temperature and follows a power-law trend. With the support of ab-initio DFT simulations, we are able to discuss the site-assignment for the probe nucleus, and thus, we can conclude with reasonable certainty, that under our experimental conditions, the 111In probe substitutes the Fe-atom at the B-site.
Key words: BiFeO3, multiferroic, magnetoelectric coupling, γ-γ angular correlations.
Thien Thanh Dang
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany)
Dr
Juliana Schell
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland)
Andrea González Boa
(European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland; Technical University of Denmark (DTU), 2800 Kongens Lyngby, Denmark)
Astita Dubey
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany)
Conny Noll
(Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany)
Daniil Lewin
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany)
Prof.
Doru C. Lupascu
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany)
IAN YAP CHANG JIE
(Universität Göttingen, Fakultät für Physik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany)
Dr
João Nuno Gonçalves
(CICECO - Aveiro Institute of Materials and Departamento de Física,Universidade de Aveiro, 3810-193 Aveiro, Portugal)
Dr
Konstantin Glukhov
(Uzhhorod National University, 88000 Uzhhorod, Ukraine)
Dr
M. Escobar Castillo
(Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany)
Prof.
Reinhard Beck
(Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany)
Dr
Zyabkin Dmitry
(Chair Materials for Electronics, Institute of Materials Science and Engineering, and Institute of Micro and Nanotechnologies MacroNano®, TU Ilmenau, 98693 Ilmenau, Germany)
