Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$

Details Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$ Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$

2004-10-09

arxiv.org/abs/cond-mat/0410224v2

Phys. Rev. Lett. 94, 157205 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

final version, to appear in PRL

Scientific paper

10.1103/PhysRevLett.94.157205

Na$_x$CoO$_2$, the parent compound of the recently synthesized superconductor Na$_x$CoO$_2$:$y$H$_2$O, exhibits bulk antiferromagnetic order below $\sim20$ K for 0.75 $\leq x \leq$ 0.9. We have performed neutron scattering experiments in which we observed Bragg reflections corresponding to A-type antiferromagnetic order in a Na$_{0.82}$CoO$_2$ single crystal and characterized the corresponding spin-wave dispersions. The spin waves exhibit a strongly energy-dependent linewidth. The in-plane and out-of-plane exchange constants resulting from a fit to a nearest-neighbor Heisenberg model are similar in magnitude, which is unexpected in view of the layered crystal structure of Na$_{x}$CoO$_2$. Possible implications of these observations are discussed.

Affiliated with

Also associated with

No associations

Rating

Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-217573