title: Resonant X-ray scattering study of quadrupole-strain coupling in DyB4.
abstract: 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.
authors.affiliation: eSSC and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, South Korea.
authors.forename: S
authors.initials: S
authors.lastname: Ji
authors.forename: C
authors.initials: C
authors.lastname: Song
authors.forename: J
authors.initials: J
authors.lastname: Koo
authors.forename: J
authors.initials: J
authors.lastname: Park
authors.forename: Y J
authors.initials: YJ
authors.lastname: Park
authors.forename: K-B
authors.initials: KB
authors.lastname: Lee
authors.forename: Seongsu
authors.initials: S
authors.lastname: Lee
authors.forename: J-G
authors.initials: JG
authors.lastname: Park
authors.forename: J Y
authors.initials: JY
authors.lastname: Kim
authors.forename: B K
authors.initials: BK
authors.lastname: Cho
authors.forename: K-P
authors.initials: KP
authors.lastname: Hong
authors.forename: C-H
authors.initials: CH
authors.lastname: Lee
authors.forename: F
authors.initials: F
authors.lastname: Iga