Direct observation of t2g orbital ordering in magnetite.
Using soft-x-ray diffraction at the site-specific resonances in the Fe L2,3 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show directly that the (001/2) diffraction peak (in cubic notation) is caused by t2g orbital ordering at octahedral Fe2+ sites and the (001) by a spatial modulation of the t2g occupation.
Schlappa
J
J
II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany.
Schüssler-Langeheine
C
C
Chang
C F
CF
Ott
H
H
Tanaka
A
A
Hu
Z
Z
Haverkort
M W
MW
Schierle
E
E
Weschke
E
E
Kaindl
G
G
Tjeng
L H
LH