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Physical reality of the Preisach model for organic ferroelectrics
Linköping University, Department of Physics, Chemistry and Biology, Complex Materials and Devices. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Complex Materials and Devices. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-4728-8446
Eindhoven Univ Technol, Netherlands.
Eindhoven Univ Technol, Netherlands.
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2018 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, article id 4409Article in journal (Refereed) Published
Abstract [en]

The Preisach model has been a cornerstone in the fields of ferromagnetism and ferroelectricity since its inception. It describes a real, non-ideal, ferroic material as the sum of a distribution of ideal hysterons. However, the physical reality of the model in ferroelectrics has been hard to establish. Here, we experimentally determine the Preisach (hysteron) distribution for two ferroelectric systems and show how its broadening directly relates to the materials morphology. We connect the Preisach distribution to measured microscopic switching kinetics that underlay the macroscopic dispersive switching kinetics as commonly observed for practical ferroelectrics. The presented results reveal that the in principle mathematical construct of the Preisach model has a strong physical basis and is a powerful tool to explain polarization switching at all time scales in different types of ferroelectrics. These insights lead to guidelines for further advancement of the ferroelectric materials both for conventional and multi-bit data storage applications.

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NATURE PUBLISHING GROUP , 2018. Vol. 9, article id 4409
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URN: urn:nbn:se:liu:diva-152613DOI: 10.1038/s41467-018-06717-wISI: 000448044300007PubMedID: 30352995OAI: oai:DiVA.org:liu-152613DiVA, id: diva2:1262102
Note

Funding Agencies|Vetenskapsradet; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [200900971]

Available from: 2018-11-09 Created: 2018-11-09 Last updated: 2018-12-03

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