Resonant X-ray scattering study of quadrupole-strain coupling in DyB4.
X-ray and neutron scattering studies were performed on DyB4 which exhibits both a quadrupolar ordering and a macroscopic lattice distortion. A forbidden reflection at 7.792 keV near the Dy L3 absorption edge is identified as a quadrupolar ordering peak, and the quadrupolar order and a monoclinic structural distortion develop concomitantly below 12.3 K as second-order-type phase transitions. Coupling between the quadrupolar order and the strain in DyB4 is directly demonstrated by observing that both order parameters are proportional to each other.
Ji
S
S
eSSC and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, South Korea.
Song
C
C
Koo
J
J
Park
J
J
Park
Y J
YJ
Lee
K-B
KB
Lee
Seongsu
S
Park
J-G
JG
Kim
J Y
JY
Cho
B K
BK
Hong
K-P
KP
Lee
C-H
CH
Iga
F
F