aSpin-phonon coupling in frustrated magnet CdCr2O4

1
aSpin-phonon coupling in frustrated magnet CdCr2O4

• Rolando Valdés Aguilar, Andrei Sushkov, H. Dennis
  Drew, G-W. Chern1, O. Tchernyshyov1

Geometric magnetic frustration is a common
feature of modern magnetic systems. The
understanding of the physical properties of these
systems and how frustration is relieved is an
active area of research. We have investigated the
far infrared properties of the material CdCr2O4
by measuring its transmission and reflection of
light as a function of temperature. We find that
the mechanism that relieves frustration at the
magnetic transition also causes one infrared
phonon to split. We have compared this work with
previous results2 of our collaboration.

• a. R. Valdes Aguilar, et al. In preparation
  (2007)
• Johns Hopkins University, Baltimore, MD.
• A.B. Sushkov, et al. Phys. Rev. Lett. 94 137202
  (2005)