Research of an origin of the unusual anomalous Hall Effect in ferromagnetic metals with a non-collinear

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We investigate an origin of the unusual behavior of the anomalous Hall Effect in metallic magnet CrTe_<1-x>Sb_x with a non-collinear magnetic structure. CrTe_<1-x>Sb_x has a NiAs-type structure. CrTe is ferromagnetic and CrSb is antiferromagnetic. In CrTe_<1-x>Sb_x with 0.25【less than or similar】x【less than or similar】0.7, a canted spin structure is formed at low temperatures. The Hall resistivity p_H of CrTe_<1-x>Sb_x shows unconventional temperature dependence1.The resistivity p of polycrystalline samples of CrTe_<1-x>Sb_x of x=0.3〜0.5 has been measured from room temperature to 10 K. The observed resistivity decreases monotonously with decreasing temperature T for all samples. It is plausible that the unconventional temperature dependence of p_H is related to the appearance of the canted spin structure.2.Single crystal growth of CrTe_<1-x>Sb_x has been performed for x=0.3 and 0.4. Small plate-like single crystals have been obtained but their quality is not enough to measurements of the magnetic and transport properties.3.Powder neutron diffraction has been performed for CrTe_<1-x>Sb_x of x=0.3 and 0.4. Temperature dependence of ferromagnetic moments M does not exhibit significant change around transition temperatures at which the canted spin structure appears with decreasing T. The fact indicates that the complicated temperature dependence of p_H does not stem from the temperature dependence of M.