Anisotropic suppression of the energy gap in CeNiSn by high magnetic fields

Takabatake, T.; Nagasawa, M.; Fujii, H.; Kido, G.; Nohara, M.; Nishigori, S.; Suzuki, T.; Fujita, T.; Helfrich, R.; Ahlheim, U.; Fraas, K.; Geibel, C.; Steglich, F.

doi:10.1103/PhysRevB.45.5740

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Anisotropic suppression of the energy gap in CeNiSn by high magnetic fields

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引用

Takabatake, T., Nagasawa, M., Fujii, H., Kido, G., Nohara, M., Nishigori, S., Suzuki, T., Fujita, T., Helfrich, R., Ahlheim, U., Fraas, K., Geibel, C., & Steglich, F. (1992). Anisotropic suppression of the energy gap in CeNiSn by high magnetic fields. Physical Review B, 45(10), 5740-5743. doi:10.1103/PhysRevB.45.5740.

引用: https://hdl.handle.net/11858/00-001M-0000-0019-D716-0

要旨

The formation of the pseudogap in CeNiSn has been investigated by means of resistivity and specific-heat measurements in high magnetic fields. When the field is raised from 0 to 12 T along the orthorhombic a axis, the semiconductorlike behavior in the resistivity below 6 K disappears and the linear electronic term in the specific heat increases from 57 to 100 mJ/K2mol. However, no significant effect was observed for fields along the b and c axes up to 15 T. These results suggest an anisotropic suppression of the pseudogap, which can be interpreted as a result of strong spin polarization of the renormalized narrow band.