Large magnetic polarization of Ti4+ ions in FeTiO3

被引：29

作者：

Fuji, T. ^{[1
]}

Yamashita, M. ^{[1
]}

Fujimori, S. ^{[1
]}

Saitoh, Y. ^{[1
]}

Nakamurac, T. ^{[1
]}

Kobayashi, K. ^{[1
]}

Takada, J. ^{[1
]}

机构：

[1] Okayama Univ, Dept Appl Chem, Okayama 7008530, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

ilmenite-hematite solid solution; electronic structure; resonance photoemission spectroscopy; magnetic circular dichroism;

D O I：

10.1016/j.jmmm.2006.10.469

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nominal valence states of Ti ions in FeTiO3 are generally considered to be Ti4+. However, due to the close energy levels between Fe2+ and Ti4+ states, there are some possibilities of intervalence charge transfer from Fe2+ to Ti4+. In order to clarify the real electronic structures of Ti ions in FeTiO3, we performed resonant photoemission spectroscopy (RPES) and X-ray magnetic circular dichroism (XMCD) across the Ti 2p -> 3d excitation. The RPES spectra clearly indicated the partial density of states derived from the Ti 3d states on the valence band. The Ti 3d states appearing at the top of the valence bands were overlapped with the Fe 3d states. Moreover, the XMCD spectra at Ti L-2,L-3 edges suggested large magnetic polarization of Ti ions in FeTiO3 in spite of nonmagnetic natures of Ti4+ ions in common sense. The Ti ions in FeTiO3 seemed to have some 3d electron densities caused by the electron transfer from the Fe 3d t(2g)down arrow states. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：E555 / E557

页数：3

共 8 条

[1] Resonant inelastic soft-x-ray scattering from valence-band excitations in 3d(0) compounds [J].