Effect of Li doping on magnetic and transport properties of CoV2O4 and   FeV2O4
  The structural, magnetic and transport properties have been studied of Li doped CoV2O4 and FeV2O4. Li doping increases the ferri-magnetic ordering temperature of both the samples but decreases the spin-glass transition temperature of CoV2O4. The Li-doping decreases the V-V distance which in effect increases the A-V coupling. Thus the increased A-V coupling dominate over the decrease in A-V coupling due to doping of non-magnetic Li. 
Prashant Shahi, R. Singh, Shiv Kumar, D. K. Dubey, D. N. Singh,   A.Tiwari, A.Tripathi, A. K. Ghosh and Sandip Chatterjee
cond-mat.str-el