Pressure dependence of the magnetic ordering temperatures in Cr‐Fe alloys

The pressure dependences of the magnetic transition temperatures of Cr‐2.5 and 2.8 at.% Fe single crystal alloys have been determined by electrical resistance and ultrasonic measurements. The results show that the 1 bar triple point (P,I,C) in the temperature concentration plane occurs at a concentration of ∠2.5 at.% Fe in contrast to the previously published value of 4 at.% Fe. The high pressure data showed an abrupt change in the pressure dependence of the I‐C transition at 3.3 kbar, from which it is speculated that an additional magnetic phase exists.