Magnetic susceptibility measured for CaV4O9 is analyzed by a method with high temperature expansion. The analysis is consistent with the g-value which is close to 2 and is observed by an ESR experiment. Four exchange parameters in a two-dimensional Heisenberg model are determined to represent CaV4O9. All the exchange parameters are about 500 K and strongly frustrated. The observed spin gap originates from the frustration.
@article{arxiv.cond-mat/9609073,
title = {Determination of Exchange Parameters for CaV_4O_9},
author = {Ken'ichi Takano and K. Sano},
journal= {arXiv preprint arXiv:cond-mat/9609073},
year = {2007}
}
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11 pages, latex format, 3 figures available on request from [email protected] (please write your postal address; figures will be sent by conventional mail)