Spin fluctuation and giant magnetoresistance in CeSi

International Workshop on Itinerant-Electron Magnetism

Noguchi, Satoru^1

Nanoscience and Nanotechnology Research Center, Osaka Prefecture University, Osaka Sakai

599-8570, Japan^1

关键词: Antiferromagnetic state;    Low temperatures;    Magnetic entropy;    Measured temperatures;    Residual resistivity;    Temperature dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/868/1/012011/pdf
DOI  :  10.1088/1742-6596/868/1/012011

来源: IOP

【 摘 要 】

We measured temperature-dependent resistivity of a CeSi single crystal under several magnetic fields in order to study the effect of the magnetic field on the spin fluctuation in the commensurately modulated antiferromagnetic state of CeSi. Resistivity under each magnetic field exhibits a clear T2dependence at low temperatures. The coefficient A of T2term decreases monotonously with increasing magnetic field. The residual resistivity at 0 T is steeply reduced around 1 T, and almost constant above 1 T. Temperature dependence of the magnetoresistivity near TNis compared with that of the isothermal change in the magnetic entropy.