Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-01-22
Physics
Condensed Matter
Strongly Correlated Electrons
24 pages, including 9 figures
Scientific paper
10.1103/PhysRevB.66.054420
We report measurements on single crystals of orthorhombic CeNiGe2, which is found to exhibit highly anisotropic magnetic and transport properties. The magnetization ratio M(H//b)/M(H^b) at 2 K is observed to be about 18 at 4 T and the electrical resistivity ratio r//b/r^b is about 70 at room temperature. It is confirmed that CeNiGe2 undergoes 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.
Harrison Neil
Jung Moon-Hee
Lacerda A. H.
Pagliuso P. G.
Sarrao John L.
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