paper

NMR characterization of spin-1/2 alternating antiferromagnetic chains in the high-pressure phase of (VO)2P2O7

arXiv:cond-mat/0402540 · doi:10.1088/0953-8984/16/12/L02

Abstract

Local-susceptibility measurements via the NMR shifts of $^{31}$ P and $^{51}$ V nuclei in the high-pressure phase of (VO) $_{2}$ P $_{2}$ O $_{7}$ confirmed the existence of a unique alternating antiferromagnetic chain with a zero-field spin gap of 34 K. The $^{31}$ P nuclear spin-lattice relaxation rate scales with the uniform spin susceptibility below about 15 K which shows that the temperature dependence of both the static and dynamical spin susceptibilities becomes identical at temperatures not far below the spin-gap energy.

6 pages, 5 figures; To be published in J. Phys. Condens. Matter