Magnetic anisotropy of single-crystal ferromagnetic Ce3RuSn6

Abstract

• A single-crystal of Ce 3 RuSn 6 ferromagnet was grown by the Czochralski pulling method. • The anisotropic magnetic properties of Ce 3 RuSn 6 single-crystal have been studied. • The magnetic structure below the Curie temperature is not a simple ferromagnetic one. Using the Czochralski pulling method, we have grown a single-crystal of orthorhombic Ce 3 RuSn 6 that exhibits a ferromagnetic transition. Here we present electrical resistivity, specific heat, and magnetization measurements of this sample in the temperature range from 2 to 300 K. The electrical resistivity ρ displays a - ln T temperature dependence from 20 K to above the Curie temperature T C = 3 K. At T C , ρ decreases, and the specific heat C exhibits a sharp peak due to the magnetic transition. The magnetization measurements reveal that the magnetization M is highly anisotropic, and the magnetic structure below T C is probably not a simple ferromagnetic structure. When the magnetic field B is applied along the b-axis or the c-axis, M shows a ferromagnetic-like rapid increase or an antiferromagnetic-like cusp anomaly, respectively, at T C . Moreover, for B | | c , a metamagnetic-like anomaly appears in the magnetization curve at B = 2.5 T. However, for B | | a , M does not exhibit a distinct anomaly at T C . The results indicate that below T C , Ce 3 RuSn 6 has a non-collinear magnetic structure and that the magnetic moments are aligned in the bc-plane.