Journal
PHYSICAL REVIEW B
Volume 81, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.104416
Keywords
-
Funding
- Russian Science Support Foundation
- Russian Ministry of Science and Education [01.740.11.0219]
- Emmy-Noether-program
- Max-Planck Society
- EU
Ask authors/readers for more resources
A joint experimental and theoretical investigation of the spin 1/2 system Cu-2(PO3)(2)CH2 suggests a description of this compound as coupled alternating antiferromagnetic Heisenberg chains. Magnetic susceptibility, specific heat, nuclear magnetic resonance, nuclear quadrupole resonance, and high-field magnetization measurements evidence a spin gap of about 25 K. Surprisingly, the leading antiferromagnetic exchange of about 75 K can be assigned by density-functional band-structure calculations to a coupling between the structural Cu2O6 dimers, whereas the coupling within these dimers is strongly reduced due to sizable ferromagnetic contributions. The coupling within the structural dimers competes with a number of long-range couplings. The present available experimental data can be consistently described in a scenario of coupled alternating chains. The proposed model should be considered as a minimal model for an appropriate description of this compound.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available