Electrical Resistivity Measurements on Antiferromagnetic Compound Ce3TiSb5

Odd-parity multipole ordering has attracted great attention owing to various unique properties. Current-induced magnetization is observed on Ce_3TiBi_5. Not only electric field but also magnetic field, pressure, and temperature are important controllable physical parameters for activating cross-correlation phenomena. Thus, physical property measurements under various conditions such as magnetic field or pressure are important even in the basic physical property.
We have focused on Ce_3TiBi_5 and Ce_3TiSb_5 which are considered to realize some magnetic toroidal ordered phase. Ce_3TiBi_5 and Ce_3TiSb_5 are intermetallic compounds and show an antiferromagnetic ordering at 5.0 K and 5.2 K, respectively. Temperature dependence of electrical resistivity of Ce_3TiBi_5 only decreases below 5.0 K. In contrast, electrical resistivity of Ce_3TiSb_5 shows a hump structure just below 5.2 K. In addition, residual resistivity of Ce_3TiSb_5 is considerably large compared to that of Ce_3TiBi_5. There is an anomaly at 2.5 K where the slope of electrical resistivity on Ce_3TiSb_5 changes. This is expected to be some phase transition due to broad peak on the temperature dependence of the specific heat. These differences between Ce_3TiBi_5 and Ce_3TiSb_5 are considered to originate from the differences of the ordered magnetic moments direction which has become clear from the anisotropy of the temperature dependence of the magnetic susceptibility. Hence, it can be expected to make a difference in multipole ordered states at ground state. We pay attention to the behavior of electrical resistivity in this system under various conditions.