Structures and magnetic properties of perovskites containing rare earths

2016 Fiscal Year Final Research Report

• Project/Area Number: 26410062
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Hokkaido University
• Principal Investigator: Hinatsu Yukio 北海道大学, 理学研究院, 特任教授 (70271707)
• Research Collaborator: OHTSUKA SHUNPEI 北海道大学, 大学院理学院化学専攻 ; NISHIYAMA ATSUHIDE 北海道大学, 大学院理学院化学専攻 ; INABAYASHI MASAKI 北海道大学, 大学院理学院化学専攻 ; TAKAGI YURI 北海道大学, 大学院理学院化学専攻 ; ENDO TAKESHI 北海道大学, 大学院理学院化学専攻
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 希土類 / ペロブスカイト / 結晶構造 / 磁気的性質

Outline of Final Research Achievements

The perovskite-type compounds containing both rare earth and rhenium Sr2LnReO6 (Ln = Y, Tb-Lu) have been prepared. Powder X-ray diffraction measurements and Rietveld analysis show that Ln3+ and Re5+ ions are structurally ordered at the B site of the perovskite SrBO3. Magnetic anomalies are found in their magnetic susceptibility and specific heat measurements at 2.6-20 K for Ln = Y, Tb, Yb, Lu compounds. They are due to magnetic interactions between Re5+ ions. The results of the magnetic hysteresis and remnant magnetization measurements for Sr2YReO6 and Sr2LuReO6 indicate that the antiferromagnetic interactions between Re5+ ions below transition temperatures have a weak ferromagnetic component. For the case of Sr2DyReO6, magnetic ordering of the Re5+ moments occurs at 93K, and with decreasing temperature, the moments of Dy3+ ferromagnetically order at 5 K from the measurements of magnetic susceptibility and specific heat.

Free Research Field

無機固体化学