Magnetic and Crystal Structures of the Room Temperature Ferrimagnet Sr3YCo4O10.5

2016 Fiscal Year Final Research Report

• Project/Area Number: 25390140
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: 一般財団法人総合科学研究機構(総合科学研究センター(総合科学研究室)及び中性子科学センター(研究開発
• Principal Investigator: Nakao Akiko 一般財団法人総合科学研究機構(総合科学研究センター(総合科学研究室)及び中性子科, 中性子科学センター, 副主任研究員 (90392050)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: コバルト酸化物 / X線回折 / 中性子回折 / 結晶構造解析 / 磁気構造解析 / フェリ磁性体

Outline of Final Research Achievements

Magnetic and crystal structures of the room-temperature ferrimagnet Sr3YCo4O10.5 have been investigated by complementarily use of neutron and synchrotron x-ray diffraction measurements. Powder X-ray diffraction experiments clarified that the ferrimagnetic phase has a triclinic structure (A-1 or A1) with a 4√2a×2√2a×4a supercell, where a is the lattice parameter of the primitive perovskite unit cell. Based on the crystal structure, the magnetic structure was estimated by using ferrimagnetic ordering model. Structural change associated with the high-spin and intermediate-spin state ordering was also observed by single-crystal X-ray structural analysis. The peculiar orbital and spin state ordering in the room-temperature ferrimagnet Sr3YCo4O10.5 was thus revealed.

Free Research Field

構造物性