Abstract
Neutron diffraction measurements on single crystals of Cr1−xVx (x=0, 0.02, 0.037)
show that the ordering moment and the Neel temperature are continuously suppressed as x
approaches 0.037, a proposed Quantum Critical Point (QCP). The wave vector Q of the spin
density wave (SDW) becomes more incommensurate as x increases in accordance with the two
band model. At xC=0.037 we have found temperature dependent, resolution limited elastic
scattering at 4 incommensurate wave vectors Q=(1�1,2, 0, 0)*2/a, which correspond to
2 SDWs with Neel temperatures of 19 K and 300 K. Our neutron diffraction measurements
indicate that the electronic structure of Cr is robust, and that tuning Cr to its QCP results not
in the suppression of antiferromagnetism, but instead enables new spin ordering due to novel
nesting of the Fermi surface of Cr.
