Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session 2
MM 18.13: Poster
Dienstag, 6. September 2022, 17:30–20:00, P2
A study of the local fields in bismuth ferrite by using different radioactive tracer ions — •Thanh T. Dang1, Juliana Schell1,2, Marianela E-Castillo1, Daniil Lewin1, Astita Dubey1, Andrea G. Boa2,3, Reinhard Beck4, Cornelia Noll4, João N. Gonçalves5, Dmitry Zyabkin6, Konstantin Glukhov7, Ian C. J. Yap8, Adeleh M. Gerami2,9, Koen V. Stiphout10, Georg Marschick11, Edgar M. S. D. Reis1,2, Sobhan M. Fathabad1, and Doru C. Lupascu1 — 1University of Duisburg-Essen — 2European Organization for Nuclear Research — 3Technical University of Denmark — 4University of Bonn — 5Universidade de Aveiro — 6TU Ilmenau — 7Uzhhorod National University — 8Universität Göttingen — 9School of Particles and Accelerators — 10Georg-August-Universität Göttingen — 11Vienna University of Technology
This work presents the study of the local electric and magnetic fields in multiferroic bismuth ferrite using Time Differential Perturbed Angular Correlation spectroscopy. The measurements were carried out at a wide range of temperatures up to 850oC, after the implantation of various radioactive tracer ions: 181Hf, 111In and 111mCd. The experimental results reflect the obedience to Landau theory and Brillouin-Weiss equation of local electric polarization and magnetization, respectively. Particularly, a huge coupling between local electric and magnetic fields has been investigated in anti-ferromagnetic order. With the support of ab-initio DFT simulations, we can conclude that 111mCd is located at Bi-atom, 181Hf and 111In substitute Fe-atom.