Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2

Details Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2 Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2

2008-05-24

arxiv.org/abs/0805.3749v1

Physics

Condensed Matter

Strongly Correlated Electrons

to appear in J. Phys. Soc. Jpn, Vol. 77, No. 7

Scientific paper

10.1143/JPSJ.77.074719

Ag2MnO2 is studied as a possible candidate compound for an antiferromagnetic XY spin model on a triangular lattice. In spite of the large Curie-Weiss temperature of -430 K found in magnetic susceptibi-lity, Mn3+ spins with S = 2 do not undergo a conventional long-range order down to 2 K probably owing to the geometrical frustration and two dimensionality in the system. Instead, a unique phase transition is found at 80 K, where specific heat exhibits a clear sign of a second-order phase transition, while magnetic susceptibility changes smoothly without a distinct anomaly. We think that this transition is related to the chirality degree of freedom associated with a short-range order, which has been expected for the classical XY spin model on a triangular lattice. On further cooling, spin-glass-like behavior is observed below 22 K, possibly corresponding to a quasi-long-range order.

Affiliated with

Also associated with

No associations

Rating

Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2 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 Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-665789