Anomalous behavior of electrical resistivity in NdFe_(11)Ti

摘要

The electrical resistivity, Q, and temperature derivative of resistivity (d /dT) of polycrystalline NdFe_(11)Ti are investigated. The resistivity exhibits an anomalous behavior at about 160 K and 220 K. These anomalies attributed to spin reorientation phenomena originate from two magnetic phase transition. A modified theoretical model for electrical resistivity, Q and dQ/dT, behavior in the spin reorientation temperature (T_(SR)) region is presented. The results suggest that the average magnetic moment at T_(SR1) ～ 160 K is aligned along a cone angle and at T_(SR2) ～ 220 K along c-axis. The temperature dependence of ac-susceptibility, χ_(ac)(T), is presented. The results show the existence of the spin reorientation related to a magnetic phase transition.