Doped BiFeO3 Nanoparticles
Final Report Abstract
Bismuth ferrite is a classical ferroelectric material which additionally undergoes a magnetic phase transition into an antiferroelectric state. In the latter, the spins of the system order antiparallel, but maintain a small tilt angle. The resulting residual magnetic moment additionally orders in the so-called spin cycloid. Globally no magnetic moment develops, because the cycloid also cancels the residual magnetic moments at larger scale. Bismuth ferrite is also a semiconductor of intermediate band gap. Many interesting technological applications have been envisaged for this system, in particular the option to generate a magnetoelectric material, if one manages to break the cancelling of the magnetic moments in the cycloid. The goal is a magnetoelectric computer memory material. Our project was designed around a pre-selection of chemically suitable dopants of BiFeO3 which would be capable of enhancing certain properties of the material. In particular, the effect of small grain sized powders on the ferroelectric properties was to be determined along with manganese as magnetic dopant and barium replacing Bi on the A-site of the crystal lattice for tailoring the lattice constant and thus modifying the magnetic coupling between adjacent iron spins. To our own surprise, of the nine work packages which we promised (one was optional), eight were fully successful. Only the decoration of BiFeO3 particles with other magnetic particles exceeded the time limits of the project. We achieved very good hyperthermia performance of the particles and outstanding photocatalytic performance. Eight papers are published, seven more are in the different stages of finalization and will be published within this year (2023).
Publications
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Tuning the optical, structural and multiferroic properties of Bismuth Ferrite (BiFeO3) Nanoparticles by Doping with Ba. 2019 IEEE International Symposium on Applications of Ferroelectrics (ISAF) (2019, 7), 1-4. American Geophysical Union (AGU).
Dubey, Astita; Castillo, M. Escobar; Shvartsman, Vladimir V.; Lupascu, Doru C.; Salamon, Soma & Wende, Heiko
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Effect of Mn and Ba Codoping on a Magnetic Spin Cycloid of Multiferroic Bismuth Ferrite Nanoparticles. The Journal of Physical Chemistry C, 124(40), 22266-22277.
Dubey, Astita; Escobar, Castillo Marianela; Landers, Joachim; Salamon, Soma; Wende, Heiko; Hagemann, Ulrich; Gemeiner, Pascale; Dkhil, Brahim; Shvartsman, Vladimir V. & Lupascu, Doru C.
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Laser Fragmentation Synthesis of Colloidal Bismuth Ferrite Particles. Nanomaterials, 10(2), 359.
Siebeneicher, Simon; Waag, Friedrich; Escobar, Castillo Marianela; Shvartsman, Vladimir V.; Lupascu, Doru C. & Gökce, Bilal
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Role of cooperative factors in the photocatalytic activity of Ba and Mn doped BiFeO3 nanoparticles. Nanoscale Advances, 3(20), 5830-5840.
Dubey, Astita; Schmitz, Alexander; Shvartsman, Vladimir V.; Bacher, Gerd; Lupascu, Doru C. & Castillo, Marianela Escobar
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Laser Ablation of NiFe2O4 and CoFe2O4 Nanoparticles. Nanomaterials, 12(11), 1872.
Sachse, Erik; Escobar-Castillo, Marianela; Waag, Friedrich; Gökce, Bilal; Salamon, Soma; Landers, Joachim; Wende, Heiko & Lupascu, Doru C.
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Mono‐, Di‐, and Tri‐Valent Cation Doped BiFe0.95Mn0.05O3 Nanoparticles: Ferroelectric Photocatalysts. Advanced Functional Materials, 32(43).
Dubey, Astita; Keat, Chin Hon; Shvartsman, Vladimir V.; Yusenko, Kirill V.; Castillo, Marianela Escobar; Buzanich, Ana Guilherme; Hagemann, Ulrich; Kovalenko, Sergey A.; Stähler, Julia & Lupascu, Doru C.
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Rare-earth doped BiFe0.95Mn0.05O3 nanoparticles for potential hyperthermia applications. Frontiers in Bioengineering and Biotechnology, 10 (2022, 10, 18).
Dubey, Astita; Salamon, Soma; Attanayake, Supun B.; Ibrahim, Syaidah; Landers, Joachim; Castillo, Marianela Escobar; Wende, Heiko; Srikanth, Hari; Shvartsman, Vladimir V. & Lupascu, Doru C.
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Temperature dependence of the local electromagnetic field at the Fe site in multiferroic bismuth ferrite. Physical Review B, 106(5).
Dang, T. T.; Schell, J.; Boa, A. G.; Lewin, D.; Marschick, G.; Dubey, A.; Escobar-Castillo, M.; Noll, C.; Beck, R.; Zyabkin, Dmitry V.; Glukhov, K.; Yap, I. C. J.; Mokhles, Gerami A. & Lupascu, D. C.
