The Co(S1-xSex)2 compounds with the cubic Pyrite structure show itinerant electron metamagnetism for 0.12≤ x. We studied the magnetocaloric effect and magnetoresistance (MR) of this system. It was found that a substantial magnetic entropy change was obtained for Co(S0.88Se0.12)2, which has a paramagnetic ground state. We observed giant positive MR associated with the itinerant electron metamagnetic transition for Co(S1-xSex)2. The magnitude of the MR jump is independent of temperature and concentration for 0.13≤ x≤ 0.15. These results are discussed in terms of a simple band structure of CoS2, in which high-spin polarization is realized in a ferromagnetic state.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering