Development of novel functional phase transition material by controlling bistable property

2017 Fiscal Year Final Research Report

• Project/Area Number: 26708008
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Functional solid state chemistry
• Research Institution: University of Tsukuba
• Principal Investigator: TOKORO Hiroko 筑波大学, 数理物質系, 教授 (50500534)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 固体物性 / 機能性材料 / 双安定性

Outline of Final Research Achievements

The objectives of this research is to develop advanced physical properties and functionalities by controlling a bistable property. First, we focused on RbMnFe Prussian blue analogue, which shows a temperature-induced charge-transfer phase transition, and studied a metal doping effect on its phase transition temperature. Then, theoretical interpretation for the Raman spectra before and after the electric-field-induced phase transition of this material was investigated. Furthermore, the optical switching of the intensity of second harmonic light was successfully observed in this material.
Theoretical calculations were performed on metal oxides having bistability at room temperature. The result indicated that the energy barrier between the metastable and stable phases can be controlled by applying the external field. This research gives us an important knowledge for the design of a high efficient external-field-response switching material.

Free Research Field

固体物性科学