| Autor: |
Yu. V. Piskunov, I. L. Svyatov, A.L. Buzlukov, S. Lekomtsev, A. Pogudin, V. V. Ogloblichev, V. E. Arkhipov, K. N. Mikhalev, A. V. Korolev, S. V. Verkhovskii, Yu. Zouev |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Journal of Alloys and Compounds. :288-291 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/j.jallcom.2006.10.057 |
| Popis: |
69 Ga nuclear magnetic resonance (NMR) line shift ( 69 K) and nuclear spin-lattice relaxation rate ( 69 T 1 -1 ) are measured for Pu 0.95 Ga 0.05 alloy, stabilized in δ-phase, in the temperature range 10 and 650K at magnetic field of 9.4 T. The shift and 69 T 1 -1 are determined correspondingly by the static and fluctuating-in-time parts of the local magnetic fields arisen at Ga due to transferred hyperfine coupling with the nearest f electron environment of more magnetic Pu. At T> 200 K, the temperature dependent part of the shift 69 K(T) scales macroscopic magnetic susceptibility Χ(T), following the Curie-Weiss law, and the product ( 69 T 1 T) increases with temperature proportionally (T+ 255) 1.5(1) . Both of the NMR observations are typical of the incoherent spin fluctuation regime of electrons in nonmagnetic 3D Kondo lattice. An estimate of the effective magnetic moment μ eff,5f (g e = 2) = 0.15(5)μ B per Pu atom points out a strong suppression of the spin magnetism in the alloy. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect