Ferroelectricity and Magnetism Could Coexist in VOCl2 Monolayers

  • Author: Liam Critchley
  • Published: 13 January 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Nanoscale/Royal Society of Chemistry
  • Associated Societies: Royal Society of Chemistry (RSC), UK
thumbnail image: Ferroelectricity and Magnetism Could Coexist in VOCl<sub>2</sub> Monolayers

Multiferroics are materials that exhibit more than one of the primary ferroic properties, i.e., ferromagnetism, ferroelectricity, and ferroelasticity, in the same phase. Multiferroic 2D materials have potential for high-density multistate data storage applications, but are challenging to realize experimentally.

Mingwen Zhao and colleagues, Shandong University, Jinan, China, have used Monte Carlo simulations and density functional theory (DFT) calculations to study monolayers of VOCl2 as a potential multiferroic 2D material. VOCl2 monolayers can easily be stripped from the bulk material. The team found that ferroelectricity and antiferromagnetism may coexist in monolayer VOCl2.

According to the calculations, the material has an intrinsic in-plane spontaneous electric polarization of about 300 pC m–1, a stable antiferromagnetism with a Néel temperature of 177 K, and an energy barrier of 0.18 eV between two ferroelectric states. The ferroelectric effects are thought to be caused by off-center vanadium ions that show pseudo-Jahn-Teller distortions. The interaction between the magnetic properties and electronic polarization in the material could make it possible to tune the ferroelectricity using a magnetic field. According to the researchers, VOCl2 monolayers are promising for use in nanoscale memory devices.


Article Views: 1517

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter

A product of ChemPubSoc Europe (16 European Chemical Societies)published by Wiley-VCH