| Autor: |
Mishina, S., Iwamoto, Y., Kohori, Y., Ueda, K., Kohara, T., Jung, M-H., Takabatake, T. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 5/1/2000, Vol. 87 Issue 9, p5134, 3p, 4 Graphs |
| Abstrakt: |
The heavy fermion compound Ce[sub 7]Ni[sub 3] is an antiferromagnet with T[sub N]∼1.7 K. According to the high pressure experiment, this compound has undergone a transition to a non-Fermi liquid state at ∼0.32 GPa and has recovered a Fermi liquid state at ∼0.62 GPa again. Before the high pressure nuclear magnetic resonance (NMR) study through two transitions, we have performed NMR experiments of [sup 61]Ni, [sup 59]Co and [sup 63]Cu in order to clarify the electronic states at ambient pressure. Two kinds of partially overlapping Ni NMR spectra were observed in Ce[sub 7]Ni[sub 3] containing an enriched [sup 61]Ni. This result may be ascribed to two intrinsic local fields presumably due to the lattice distortion, etc. All the relaxation rates studied here are proportional to temperature above 1.4 K in the paramagnetic state, which indicates that the systems are in the Fermi liquid state at ambient pressure. The increase of (1/T[sub 1]T) with increasing Co concentration, C[sub Co], tells us that the partial density of states on Ni-3d states at Fermi level, N(E[sub F])[sub Ni], increase with C[sub Co]. On the contrary, C[sub Cu]-independent (1/T[sub 1]T) values indicate N(E[sub F])[sub Ni] keep almost constant with Cu doping. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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