Development of polar materials by the control of the arrangement of cations and the Coulomb repulsion between cations

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04128
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Gakushuin University
• Principal Investigator: Inaguma Yoshiyuki 学習院大学, 理学部, 教授 (00240755)
• Co-Investigator(Kenkyū-buntansha): 勝又 哲裕 東海大学, 理学部, 教授 (90333020)
• Co-Investigator(Renkei-kenkyūsha): MORI Daisuke 三重大学, 工学研究科, 准教授 (00432021) ; UEDA Koichiro 学習院大学, 理学部, 助教 (60794089)
• Research Collaborator: KOJITANI Hiroshi ; AKAOGI Masaki ; NAKAYAMA Masanobu
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 極性化合物 / 高圧合成 / リチウムナイベート / ペロブスカイト / 強誘電性 / 陽イオン反発

Outline of Final Research Achievements

Polar materials exhibit functionalities attributable to the non-centrosymmetry such as ferroelectricity, piezoelectricity, pyroelectricity, and second-order nonlinear optical behavior, and are technologically important because they can be applied to electronic and optical devices such as memory and laser materials. In this study, we aimed to develop polar oxide-based materials by the control of the arrangement of cations and the Coulomb repulsion between cations. Consequently, we have successfully synthesized several polar materials under high-pressure of several GPa. We have analyzed the crystal structure, evaluated the physical properties, and elucidated the relationship between the structure and polarity.

Free Research Field

無機固体化学