Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-06-08
Physics
Condensed Matter
Strongly Correlated Electrons
13 pages, 5 figures
Scientific paper
The temperature dependences of magnetization, electrical transport, and thermal transport properties of antiperovskite compound SnCMn3 have been investigated systematically. A positive magnetoresistance (~11%) is observed around the ferrimagnetic-paramagnetic transition (TC ~ 280 K) in the field of 50 kOe, which can be attributed to the field-induced magnetic phase transition. The abnormalities of resistivity, Seebeck coefficient, normal Hall effect and thermal conductivity near TC are suggested to be associated with an abrupt reconstruction of electronic structure. Further, our results indicate an essential interaction among lattice, spin and charge degrees of freedom around TC. Such an interaction among various degrees of freedom associated with sudden phase transition is suggested to be characteristic of Mn-based antiperovskite compounds.
Dai J. M.
Song Wei-Hong
Sun Ya-Ping
Tong Peiqing
Wang Bing-Shen
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