Physics – Condensed Matter – Materials Science
Scientific paper
2009-07-29
Physics
Condensed Matter
Materials Science
14 pages, 5 figures
Scientific paper
The two-dimensional (2D) quantum spin system (CuCl)LaNb2O7 has a spin-singlet ground state with a gap of 2.3 meV, while the isostructural material (CuBr)LaNb2O7 displays collinear antiferromagnetic order at TN = 32 K. Here we report on the synthesis of solid solution (CuCl1-xBrx)LaNb2O7 (0 < x < 1), and its structural and magnetic properties by means of magnetic susceptibility, high-field magnetization, and neutron diffraction studies. The x-dependence of cell parameters follows Vegards law, verifying the uniform distribution of Cl and Br atoms at the halide site, though a more complex structural evolution is inferred from an opposing correlation between the intra- and interlayer cell distances (vs. x). 5%-Br substitution is found to induce antiferromagnetic order with TN = 7 K, consistent with a recent mSR study, and the magnetic structure is collinear, having a significantly reduced moment. Further Br substitution leads to a linear increase in TN up to x = 1. These results indicate that (CuCl)LaNb2O7 is located in the vicinity of the quantum phase boundary.
Ajiro Yoshitami
Kageyama Hiroshi
Kindo Koichi
Kitada Atsushi
Kiuchi Yuko
No associations
LandOfFree
Synthesis, Structural and magnetic properties of the solid solution (CuCl1-xBrx)LaNb2O7 (0<x<1) 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 Synthesis, Structural and magnetic properties of the solid solution (CuCl1-xBrx)LaNb2O7 (0<x<1), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis, Structural and magnetic properties of the solid solution (CuCl1-xBrx)LaNb2O7 (0<x<1) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-521561