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Resistivity, Hall effect and Shubnikov-de Haas oscillations in CeNiSn | | T. Terashima
; C. Terakura
; S. Uji
; H. Aoki
; Y. Echizen
; T. Takabatake
; | | Date: |
16 Jul 2002 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | The resistivity and Hall effect in CeNiSn are measured at temperatures down to 35 mK and in magnetic fields up to 20 T with the current applied along the {it b} axis. The resistivity at zero field exhibits quadratic temperature dependence below $sim$0.16 K with a huge coefficient of the $T^2$ term (54 $mu$$Omega$cm/K$^2$). The resistivity as a function of field shows an anomalous maximum and dip, the positions of which vary with field directions. Shubnikov-de Haas (SdH) oscillations with a frequency {it F} of $sim$100 T are observed for a wide range of field directions in the {it ac} and {it bc} planes, and the quasiparticle mass is determined to be $sim$10-20 {it m}$_e$. The carrier density is estimated to be $sim10^{-3}$ electron/Ce. In a narrow range of field directions in the {it ac} plane, where the magnetoresistance-dip anomaly manifests itself clearer than in other field directions, a higher-frequency ($F=300sim400 ext{T}$) SdH oscillation is found at high fields above the anomaly. This observation is discussed in terms of possible field-induced changes in the electronic structure. | | Source: | arXiv, cond-mat/0207379 | | Services: | Forum | Review | PDF | Favorites | |
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