Study of transition metal oxides with the dimer structures

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04641
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26020:Inorganic materials and properties-related
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Urushihara Daisuke 名古屋工業大学, 工学(系)研究科(研究院), 助教 (60824886)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 結晶構造解析 / 二量体構造 / 磁気物性

Outline of Final Research Achievements

The crystal structure and electrical properties of NaCu2VP2O10 were investigated to understand the physical properties attributed to the dimmer structures. In NaCu2VP2O10, CuO4 plaquettes form Cu2O6 structural dimers through edge-sharing. NaCu2VP2O10 shows a nonmagnetic spin-singlet ground state at low temperatures. In contrast, when a few nonmagnetic ions were substituted at the Cu sites, impurity-induced antiferromagnetism was observed in NaCu2VP2O10. Controlling the atomic arrangements in the local structure leads to changes in magnetic properties.

Free Research Field

電子セラミックス

Academic Significance and Societal Importance of the Research Achievements

遷移金属酸化物は金属イオンの配位環境や局所構造に起因して様々な電子物性を示す。磁性イオンが二量体構造を形成する化合物では量子ゆらぎの効果を示すことがあり、特徴的な電子物性を示すことがある。このような物質群の局所構造を制御することで電子物性の開拓を目指し、結晶構造解析および物性評価を行った。本研究で得られた二量体構造の配位環境の制御およびその磁気物性に関する知見は新規機能性物質の探索を加速させることが期待できる。