2018年8月15日
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals.
Journal of visualized experiments : JoVE
- ,
- ,
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- 巻
- 2018
- 号
- 138
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3791/58018
- 出版者・発行元
- JOURNAL OF VISUALIZED EXPERIMENTS
Materials showing coupling phenomena between magnetism and (ferro)electricity, i.e., magnetoelectric effects, have attracted a great deal of attention due to their potential applications for future device technologies such as sensors and storage. However, conventional approaches, which usually utilize materials containing magnetic metal ions (or radicals), have a major problem: only a few materials have been found to show the coupling phenomena at room temperature. Recently, we proposed a new approach to achieve room-temperature magnetoelectrics. In contrast to conventional approaches, our alternative proposal focuses on a completely different material, a "liquid crystal", free from magnetic metal ions. In such liquid crystals, a magnetic field can be utilized to control the orientational state of constituent molecules and the corresponding electric polarization through magnetic anisotropy of the molecules; it is an unprecedented mechanism of the magnetoelectric effect. In this context, this paper provides a protocol to measure ferroelectric properties induced by a magnetic field, that is, the direct magnetoelectric effect, in a liquid crystal. With the method detailed here, we successfully detected magnetically-tuned electric polarization in the chiral smectic C phase of a liquid crystal at room temperature. Taken together with the flexibility of constituent molecules, which directly affects the magnetoelectric responses, the introduced method will serve to allow liquid crystal cells to acquire more functions as room-temperature magnetoelectrics and associated optical materials.
- リンク情報
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- DOI
- https://doi.org/10.3791/58018
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/30176016
- PubMed Central
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6126817
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000444913100091&DestApp=WOS_CPL
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85054473410&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85054473410&origin=inward
- ID情報
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- DOI : 10.3791/58018
- ISSN : 1940-087X
- PubMed ID : 30176016
- PubMed Central 記事ID : PMC6126817
- SCOPUS ID : 85054473410
- Web of Science ID : WOS:000444913100091