Electrical Resistivity and Antiferromagnetism in Binary Chromium Alloys with Molybdenum and Tungsten

Electrical resistivity has been studied as a function of temperature between 4° and 325°K on two series of binary chromium alloys containing 0.6, 1.6, 3.2, 5.1, 6.9, or 8.8 at.% molybdenum and 0.3, 0.7, 1.0, or 3.4 at.% tungsten. These studies show that the Néel temperature $T_{\mathrm{N}}$ decreases linearly with increasing molybdenum of tungsten concentrations with slopes of about 14°K/at.% Mo and 29°K/at.% W. These decreases of $T_{\mathrm{N}}$ are understandable from the viewpoint of the recent theory by Fedders and Martin and the Fermi surface calculations by Lomer and Loucks. The larger lowering of $T_{\mathrm{N}}$ by tungsten than by molybdenum can be related to its less pronounced localization of $d$ electron wavefunctions. The contribution to the electrical resistivity due to 1 at.% molybdenum or tungsten in solid solution in chromium is 0.8 and 1.1 μΩ·cm, respectively. The samples containing 3.4 at.% tungsten and 6.9 at.% molybdenum exhibit a minimum in the electrical resistivity‐temperature curves at low temperatures. It is suggested that this minimum results from the Kim effect.