Pressure effect on magnetic properties of valence fluctuating system Ce(Ni1-xCux)5

Электронные свойства многокомпонентных соединений

Автор(и)

  • G.E. Grechnev B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • A.V. Logosha B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • A.S. Panfilov B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • I.V. Svechkarev B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • O. Musil Charles University, Faculty of Mathematics and Physics, Department of Electronic Structures, Ke Karlovu 5, 121 16 Prague 2, The Czech Republic
  • P. Svoboda Charles University, Faculty of Mathematics and Physics, Department of Electronic Structures, Ke Karlovu 5, 121 16 Prague 2, The Czech Republic

DOI:

https://doi.org/10.1063/1.3671862

Ключові слова:

intermediate valence, magnetic susceptibility, pressure effect, electronic structure.

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 77.3 and 300 K. A pronounced pressure effect on susceptibility is found to be negative in sign and nonmonotonously 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, and appeared to be in close agreement with experimental data.

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Опубліковано

2011-08-22

Як цитувати

(1)
Grechnev, G.; Logosha, A.; Panfilov, A.; Svechkarev, I.; Musil, O.; Svoboda, P. Pressure Effect on Magnetic Properties of Valence Fluctuating System Ce(Ni1-xCux)5: Электронные свойства многокомпонентных соединений. Fiz. Nizk. Temp. 2011, 37, 1062-1067.

Номер

Том 37 № 9-10 (2011)

Розділ

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