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Magnetovolume effect in Ce(Ni1−xCux)₅ alloys
Репозиторій DSpace/Manakin
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Magnetovolume effect in Ce(Ni1−xCux)₅ alloys
Інший ID:
PACS: 71.20.Eh, 75.30.Mb, 75.80.+q
Посилання:
Magnetovolume effect in Ce(Ni1−xCux)₅ alloys / G.E. Grechnev, A.V. Logosha, A.S. Panfilov, I.V. Svechkarev, O. Musil, P. Svoboda // Физика и техника высоких давлений. — 2007. — Т. 17, № 1. — С. 59-66. — Бібліогр.: 22 назв. — англ.
Підтримка:
The work of P.S. and O.M. is a part of the research program MSM 0021620834 financed by the Ministry of Education of the Czech Republic. The authors thank S.N. Dolya for discussions and V.A. Desnenko for help in magnetic measurements.
Дата:
2007
Переглядів:
921
Завантажень:
664
Анотація:
Magnetic susceptibility χ of the isostructural Ce(Ni1−xCux)₅ alloys (0 ≤ x ≤ 0.9) was studied as a function of the hydrostatic pressure up to 2 kbar at fixed temperatures of 77.3 and 300 K, using a pendulum-type magnetometer. A pronounced pressure effect on χ is found to be negative in sign and strongly (non-monotonously) dependent on the Cu content, showing a sharp maximum at x ≅ 0.4. The experimental results are discussed in terms of the valence instability of Ce ion in the studied alloys. For the reference CeNi₅ compound the main contributions to χ and their volume dependence are calculated ab initio within the local spin density approximation (LSDA), and appeared to be in close agreement with experimental data.
