Development of resonant X-ray magnetic scattering method under high pressure and magnetic structural analysis of minerals

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740354
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: OKUBE Maki 東京工業大学, 応用セラミックス研究所, 助教 (10397060)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: Ｘ線共鳴磁気散乱 / マグネタイト / 磁気構造

Outline of Final Research Achievements

The experimental and theoretical development of the resonant X-ray magnetic scattering (RXMS) analysis was performed with the aim of applying it to crystallographic magnetic structural studies. Accurate estimation of the anomalous scattering factor f’ and the anomalous magnetic scattering factor fm” was carried out for magnetite to quantify resonant effect associated with different coordination environments of iron ions in crystals. By examining the energy dependence of the resonant magnetic peaks, the density of state of unpaired 3d electrons of iron was evaluated site-selectively. The energies of electrons in e and t2 orbitals of ions in A site as well as t2g and eg orbitals of ions in B site were obtained experimentally. The magnetic electron density distribution map was obtained using extended difference Fourier analysis.

Free Research Field

地球惑星関連物質のX線構造解析