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New multiferroic materials from building blocks

Date:
October 3, 2016
Source:
National Institute for Materials Science
Summary:
A research group has developed room temperature multiferroic materials by a layer-by-layer assembly of nanosheet building blocks. Multiferroic materials are expected to play a vital role in the development of next-generation multifunctional electronic devices.
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A research group in Japan successfully developed room temperature multiferroic materials by a layer-by-layer assembly of nanosheet building blocks. Multiferroic materials are expected to play a vital role in the development of next-generation multifunctional electronic devices.

A research group led by principal investigator Minoru Osada and fellow Takayoshi Sasaki, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), successfully developed room temperature multiferroic materials by a layer-by-layer assembly of nanosheet building blocks. Multiferroic materials are expected to play a vital role in the development of next-generation multifunctional electronic devices.

The design of new multiferroics, or materials that display both ferroelectricity and ferromagnetism, is of fundamental importance for new electronic technologies. However, the co-existence of ferroelectricity and magnetic order at room temperature in single compounds is rare, and heterostructures with such multiferroic properties have only been made with complex techniques (such as pulsed-laser deposition and molecular beam epitaxy).

Seeking to develop room-temperature multiferroics, the research group utilized a new chemical design for artificial multiferroic thin films using two-dimensional oxide nanosheets as building blocks. This approach enables engineering the interlayer coupling between the ferromagnetic and ferroelectric orders, as demonstrated by artificial superlattices composed of ferromagnetic Ti0.8Co0.2O2 nanosheets and dielectric perovskite-structured Ca2Nb3O10 nanosheets. The (Ti0.8Co0.2O2/Ca2Nb3O10/Ti0.8Co0.2O2) superlattices exhibit the multiferroic effects at room temperature, which can be modulated by tuning the interlayer coupling (i.e., the stacking sequence).

This study opens a pathway to create new artificial materials with tailored multiferroic properties. In addition, the successful development of room temperature multiferroic nanofilms may lead to their application to new memory devices, taking advantage of their multifunctionality and low-voltage operation. This study was published in the online version of the Journal of the American Chemical Society on June 13, 2016.


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Journal Reference:

  1. Bao-Wen Li, Minoru Osada, Yasuo Ebina, Shigenori Ueda, Takayoshi Sasaki. Coexistence of Magnetic Order and Ferroelectricity at 2D Nanosheet Interfaces. Journal of the American Chemical Society, 2016; 138 (24): 7621 DOI: 10.1021/jacs.6b02722

Cite This Page:

National Institute for Materials Science. "New multiferroic materials from building blocks." ScienceDaily. ScienceDaily, 3 October 2016. <www.sciencedaily.com/releases/2016/10/161003094219.htm>.
National Institute for Materials Science. (2016, October 3). New multiferroic materials from building blocks. ScienceDaily. Retrieved July 21, 2024 from www.sciencedaily.com/releases/2016/10/161003094219.htm
National Institute for Materials Science. "New multiferroic materials from building blocks." ScienceDaily. www.sciencedaily.com/releases/2016/10/161003094219.htm (accessed July 21, 2024).

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