Abstract
We have performed 23Na and 51V NMR measurements to study the magnetic frustration effect on the local magnetic properties of NaV2O4 with the double chain structure. In the paramagnetic state, we find the presence of the ferromagnetic interaction, which competes with the antiferromagnetic interaction, coming from the multi-band effect. The spin structure in the magnetically ordered state, an incommensurate helical structure which appears due to the competition between the magnetic interactions, is proposed. Thus the magnetic frustration closely related to the multi-band effect is concluded to play an essential role for the magnetic properties of NaV2O4.
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