Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00168 : Unusual Magnetic Behaviors with Large Anisotropy and 1/3 Magnetization Plateau in the CoV$_{2}$O$_{6}$
Author:
The pseudo-one dimensional brannerite type CoV$_{2}$O$_{6}$ has
been studied by magnetization measurement, heat capacity and
neutron powder diffraction between 300 and 1.5K. CoV$_{2}$O$_{6}
$ crystallizes in two modifications; a low-temperature $\gamma$-
form of triclinic structure and high-temperature $\alpha$-form
of monoclinic structure. $\alpha$-CoV$_{2}$O$_{6}$ of
monoclinic structure shows a large magnetic anisotropy and an
antiferromagnetic transition at T$_{N}$=14K. Furthermore, the
magnetization measurement up to 9T shows 1/3 magnetization
plateau below 10K and saturated magnetic moment ~4.5$\mu_{B}
$/Co$^{2+}$, which is much larger than the spin-only value of
3.0$\mu_{B}$/Co$^{2+}$ for the full moments of Co$^{2+}$ ions.
On the contrary, $\gamma$-CoV$_{2}$O$_{6}$ of triclinic
structure shows saturated magnetic moment 3.0$\mu_{B}$/Co$^{2+}
$ with antiferromagnetic trantion at T$_{N}$=6.2K. We discuss
the different magnetic behaviors of the $\alpha$- and $\gamma$-
phase of CoV$_{2}$O$_{6}$.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.168
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