A new magnetic phase in the SDW alloy Cr+3.2%Co: effect of doping with V

When Cr + 3.2% Co is held cooled (FC) from 400 K through the Neel temperature T-N similar to 330 K in the 100 Oe measuring held of a SQUID magnetometer, irreversibility of the magnetic susceptibility chi(T) occurs relative to the zero-field-cooled (ZFC) state, beginning at the irreversibility limiting temperature T-i = 385 K. T-i(x) decreases in ternary (Cr + 3.2% Co)(1-x) V-x alloys with up to x = 1% V, but more slowly than T-N (x), and the relative magnitude of the hysteresis increases. It is believed that a phase transition occurs at T-i, perhaps to a local spin-density-wave state.