Hybrid Molecular Ferroelectrics-Hallmarks and Design

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Hybrid and Composite Crystalline Materials".

Deadline for manuscript submissions: closed (20 August 2021) | Viewed by 2857

Special Issue Editors


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Guest Editor
Division of Materials Physics and Center of Excellence for Advanced Materials and Sensing Devices, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
Interests: XRPD at ambient and non-ambient conditions; structure solution from XRPD data; synthesis/characterization of hybrid molecular ferroelectrics

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Guest Editor
Center for High Pressure Science & Technology Advanced Research, Beijing 100094, China
Interests: high pressure science; synthesis and characterization of functional molecular materials

Special Issue Information

Dear Colleagues,

Intensive research on molecular ferroelectrics (MFs) with controllable magnetoelectric (ME) properties has triggered a targeted quest for developing reproducible synthetic pathways to prepare hybrid ferroelectrics hallmarking multiple bistability. As a first and mandatory step, rational synthesis defines the key features of the final product, leading to one of the most critical obstacles that are still challenging researchers today—how to single out the molecular ferroelectrics from the numerous crystalline materials? Thus, one of the major driving forces delicately correlates the symmetry-breaking phenomena during the paraelectric-to-ferroelectric phase transition in MFs and resulting functional properties, thus highlighting a mandatory role of structural investigations in the course of ME response tuning.

The Special Issue on “Hybrid Molecular Ferroelectrics—Hallmarks and Design” outlines up-to-date progress in the bistable molecular ferroelectrics’ family by delivering specific breakthroughs captured using pressure/temperature-induced X-ray powder diffraction experiments along with detailed electrical and magnetic measurements.

Dr. Martina Vrankić
Dr. Takeshi Nakagawa
Guest Editors

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Keywords

  • hybrid improper ferroelectricity
  • magnetoelectric coupling
  • symmetry breaking
  • powder diffraction at ambient and non-ambient conditions
  • paraelectric-to-ferroelectric phase transition

Published Papers (1 paper)

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Research

14 pages, 12877 KiB  
Article
A Structural Study of 0.06LiNbO3-0.94K0.5Na0.5NbO3 from Neutron Total Scattering Analysis
by J. Kong, J. Liu, F. Marlton, M. R. V. Jørgensen and A. Pramanick
Crystals 2021, 11(4), 395; https://doi.org/10.3390/cryst11040395 - 8 Apr 2021
Cited by 1 | Viewed by 2478
Abstract
The structure of ferroelectric 0.06LiNbO3-0.94K0.5Na0.5NbO3 (KNNL6) was investigated by the neutron total scattering method in the temperature range of 290–773 K. The Rietveld analysis using the powder neutron diffraction data in the range of 290–773 K [...] Read more.
The structure of ferroelectric 0.06LiNbO3-0.94K0.5Na0.5NbO3 (KNNL6) was investigated by the neutron total scattering method in the temperature range of 290–773 K. The Rietveld analysis using the powder neutron diffraction data in the range of 290–773 K indicates transition from a two-phase (monoclinic and tetragonal) mixture at room temperature to tetragonal and cubic phases at higher temperatures. However, characterization of the local structure by the pair distribution function (PDF) method indicates that the local structure (r ≲ 10 Å) stays monoclinic over the same temperature range. Besides, the local oxygen octahedral distortion exhibits smaller changes with temperature than what is observed for the long-range average structure. Full article
(This article belongs to the Special Issue Hybrid Molecular Ferroelectrics-Hallmarks and Design)
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