Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 929, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.167271
Keywords
Multiferroicity; Ferroelectricity; Magnetism; Single-phase magnetoelectric
Categories
Funding
- CNPq Brazilian agency [404538/2021-5, 409531/2016-2]
- FAPESP Brazilian agency [2019/03110-8, 2017/13769-1, 2019/16978-6]
- National Natural Science Foundation of China [51961145105]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
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This study reveals that the magnetoelectric coupling in PZT-xPFN solid solutions is dependent on PFN concentration, with different mechanisms at low, intermediate, and high concentrations resulting in varying linear magnetoelectric coupling effects.
Although a high technological interest, there are only a few single-phase solid solutions that exhibit multiferroic and magnetoelectric coupling at room temperature. In this work, such characteristics are reported for PZT-xPFN solid solutions. It is noticed that magnetoelectric coupling and its nature are anomalously dependent on the PFN concentration, resulting from linear magnetoelectric and paramagnetoelectric contributions. The origin of the multiferroicity and the magnetoelectric coupling is explained by considering the presence and evolution of complex defects and magnetic nanoregions caused by PFN addition. For the lower PFN (x = 0.10), the magnetic order is related to Fe-Vo complex defects. For intermediary Fe-Nb concentration (0.15 < x < 0.25), the equimolar Fe-Nb and well-distributed Fe3+ ions result in a paramagnetic system, without linear magnetoelectric coupling. Finally, for higher Fe-Nb concentrations (0.30 < x < 0.35), the magnetic order is related to the existence of Fe-rich nanoregions, resulting in a linear magnetoelectric coupling three times smaller than that measured for lower PFN content.(c) 2022 Elsevier B.V. All rights reserved.
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