Charge-orbital ordering and Verwey transition in magnetite measured by resonant soft X-ray scattering.
We report experimental evidence for the charge-orbital ordering in magnetite below the Verwey transition temperature T(V). Measurements of O K-edge resonant x-ray scattering on magnetite reveal that the O 2p states in the vicinity of the Fermi level exhibit a charge-orbital ordering along the c axis with a spatial periodicity of the doubled lattice parameter of the undistorted cubic phase. Such a charge-orbital ordering vanishes abruptly above T(V) and exhibits a thermal hysteresis, correlating closely with the Verwey transition in magnetite.
Huang
D J
DJ
National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan. djhuang@nsrrc.org.tw
Lin
H-J
HJ
Okamoto
J
J
Chao
K S
KS
Jeng
H-T
HT
Guo
G Y
GY
Hsu
C-H
CH
Huang
C-M
CM
Ling
D C
DC
Wu
W B
WB
Yang
C S
CS
Chen
C T
CT