Magnetic and transport properties in ferromagnet UTeS

Ikeda, Shugo; Sakai, Hironori   ; Matsuda, Tatsuma; Aoki, Dai*; Homma, Yoshiya*; Yamamoto, Etsuji  ; Nakamura, Akio; Shiokawa, Yoshinobu*; Haga, Yoshinori   ; Onuki, Yoshichika*

The ferromagnet UTeS with the Curie temperature = 87 K has been studied by measuring the magnetization, magnetic susceptibility, electrical resistivity, magnetoresistance, Hall resistivity and specific heat. The magnetization was found to be highly anisotropic. The easy-axis was determined as the [001] direction,whereas the hard-axis magnetization for [100] decreases below , indicating an antiferromagnetic feature. The electrical resistivity also indicates a peak structure at . These results suggest that UTeS is a canted ferromagnet. A large negative magnetoresistance was also observed around . From the result of the Hall resistivity measurement, UTeS is thought to be a semimetal. This is consistent with the large value of the electrical resistivity and the small electronic specific heat coefficient.