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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 668944.0, MPI für Chemische Physik fester Stoffe / publications 2013
Quadrupole effects in tetragonal crystals PrCu2Si2 and DyCu2Si2
Authors:Mitsumoto, K.; Goto, S.; Nemoto, Y.; Akatsu, M.; Goto, T.; Dung, N. D.; Matsuda, T. D.; Haga, Y.; Takeuchi, T.; Sugiyama, K.; Settai, R.; Onuki, Y.
Language:English
Date of Publication (YYYY-MM-DD):2013-07-24
Title of Journal:Journal of Physics: Condensed Matter
Volume:25
Issue / Number:29
Start Page:296002-1
End Page:296002-8
Sequence Number of Article:296002
Review Status:not specified
Audience:Not Specified
Abstract / Description: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.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000321219200011 [ID No:1]
ISSN:0953-8984 [ID No:2]
DOI:10.1088/0953-8984/25/29/296002
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