Hall Effect of Magnetically Ordered MnAs1−xPxMixed Crystals

The Hall resistivity ϱ H of MnAs 1− x P x polyerystals is measured for three compositions: x = 0.11, x = 0.08, x = 0.05, for magnetic inductions up to 0.28 T and for temperatures between 80 and 370 K. For x = 0.11, ϱ H could be separated into a normal and an anomalous contribution to the Hall effect. The total free d‐carrier density may be inferred at high temperatures ( n d f = 7 × 10 21 cm ×3 at 300 K); also, d‐electron localization effects are detected at the high spin–low spin transition at T hl and at the Néel temperature T N . The anomalous Hall effect below the Curietype temperature T 1 is assigned to anisotropic scattering of free d‐carriers on localized cation d‐spins.