Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5

Details Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5 Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5

2007-08-19

arxiv.org/abs/0708.2550v1

Physics

Condensed Matter

Strongly Correlated Electrons

submitted for publication

Scientific paper

10.1103/PhysRevB.77.014428

In2VO5, containing magnetically frustrated zig-zag chains, shows a remarkable magnetic crossover at 120 K between paramagnetic states with positive (17 K) and negative (-70 K) Weiss temperatures. Magnetic moment and entropy data show that the V4+ S = 1/2 spins condense into S = 1 triplet dimers below the crossover. A further freezing of the antiferromagnetically coupled triplet dimers into a global singlet state is observed at 2.5 K, with no long range magnetic order down to 0.42 K and in fields up to 9 T. No structural V-V dimerization is observed by high-resolution X-ray diffraction down to 10 K, but a subtle lattice anomaly evidences a spin-lattice coupling in the triplet dimer state. This is assigned to longitudinal oxygen displacement modes that reduce frustration within the chains and so couple to the spin dimer fluctuations.

Affiliated with

Also associated with

No associations

Rating

Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5 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 Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-587600