Magnetocrystalline anisotropy in a single crystal of CeNiGe2

Article

关键词: MAGNETIC-PROPERTIES;    HEAT-CAPACITY;    CE;    TEMPERATURE;    CEPTSI2;    SYSTEM;   

DOI  :  10.1103/PhysRevB.66.054420

来源: SCIE

【 摘 要 】

We report measurements on single crystals of orthorhombic CeNiGe2, which is found to exhibit highly anisotropic magnetic and transport properties. The magnetization ratio M(Hparallel tob)/M(Hperpendicular tob) at 2 K is observed to be about 18 at 4 T and the electrical resistivity ratio rho(parallel tob)/rho(perpendicular tob) is about 70 at room temperature. It is confirmed that CeNiGe2 undergoes a two-step antiferromagnetic transition at 4 and 3 K, as reported for polycrystalline samples. The application of magnetic field along the b axis (the easy magnetization axis) stabilizes a ferromagnetic correlation between the Ce ions and enhances the hopping of carriers. This results in large negative magnetoresistance along the b axis.

【 授权许可】

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