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  Quadrupole effects in tetragonal crystals PrCu2Si2 and DyCu2Si2

Mitsumoto, K., Goto, S., Nemoto, Y., Akatsu, M., Goto, T., Dung, N. D., et al. (2013). Quadrupole effects in tetragonal crystals PrCu2Si2 and DyCu2Si2. Journal of Physics: Condensed Matter, 25(29): 296002, pp. 296002-1-296002-8. doi:10.1088/0953-8984/25/29/296002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1E88-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1E89-E
Genre: Journal Article

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 Creators:
Mitsumoto, K.1, Author              
Goto, S., Author
Nemoto, Y., Author
Akatsu, M., Author
Goto, T., Author
Dung, N. D., Author
Matsuda, T. D., Author
Haga, Y., Author
Takeuchi, T., Author
Sugiyama, K., Author
Settai, R., Author
Onuki, Y., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, ou_1863404              

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 Abstract: We have investigated quadrupole effects in tetragonal crystals of PrCu2Si2 and DyCu2Si2 by means of low-temperature ultrasonic measurements. The elastic constant C-44 of PrCu2Si2 exhibits pronounced softening below 70 K down to a Neel temperature T-N = 20 K, which is described in terms of a quadrupole susceptibility for a Gamma(5) doublet ground state and a Gamma(3) singlet first excited state located at 15.6 K in the crystalline electric field scheme. The C-44 and C-66 of DyCu2Si2 also show softening below 70 K down to T-N1 = 9.7 K. A low-lying pseudo-sextet state consisting of three Kramers doublets of Gamma(6) circle plus 2 Gamma(7) brings about softening of C-44 and C-66 in DyCu2Si2.

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Language(s): eng - English
 Dates: 2013-07-24
 Publication Status: Published in print
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 Table of Contents: -
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Title: Journal of Physics: Condensed Matter
Source Genre: Journal
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Pages: - Volume / Issue: 25 (29) Sequence Number: 296002 Start / End Page: 296002-1 - 296002-8 Identifier: ISSN: 0953-8984