Abstract

We synthesized the powder samples of Ba(Cu 1- x Zn x ) 2 V 2 O 8 ( x =0 -0.1) and investigated their magnetic susceptibilities. It was proved that the ground state of BaCu 2 V 2 O 8 is of spin-singlet with an energy gap of Δ=343 K to the excited state, which is characteristic of the alternating spin chain. With increasing x , the Curie–Weiss term increases in the low temperature region, whereas Δ is almost independent of x . Besides the Weiss temperature, θ, is only about 1 K for Zn-substituted samples. These results indicate that the weaker interaction in the chain is almost zero while the stronger one about 343 K. Namely, the dimer pair in the alternating chain is almost isolated. This is probably due to the anisotropy of the Cu 3 d -orbital occupied by the hole as well as the characteristic connection of the CuO 6 octahedra.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.