Published July 24, 2013 | Version v1
Journal article Metadata-only

Quadrupole effects in tetragonal crystals PrCu2Si2 and DyCu2Si2

Creators

  • 1. Graduate School of Science and Technology, Niigata University, Niigata 950-2181 (Japan)
  • 2. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)
  • 3. Low Temperature Center, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
  • 4. Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)

Description

We have investigated quadrupole effects in tetragonal crystals of PrCu2Si2 and DyCu2Si2 by means of low-temperature ultrasonic measurements. The elastic constant C44 of PrCu2Si2 exhibits pronounced softening below 70 K down to a Néel temperature TN = 20 K, which is described in terms of a quadrupole susceptibility for a Γ5 doublet ground state and a Γ3 singlet first excited state located at 15.6 K in the crystalline electric field scheme. The C44 and C66 of DyCu2Si2 also show softening below 70 K down to TN1 = 9.7 K. A low-lying pseudo-sextet state consisting of three Kramers doublets of Γ6⊕2Γ7 brings about softening of C44 and C66 in DyCu2Si2. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/0953-8984/25/29/296002

Additional details

Identifiers

DOI
10.1088/0953-8984/25/29/296002;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
25
Journal Issue
29
Journal Page Range
[8 p.]
ISSN
0953-8984
CODEN
JCOMEL

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44114422
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
COPPER COMPOUNDS; CRYSTAL STRUCTURE; CRYSTALS; DYSPROSIUM COMPOUNDS; ELASTICITY; ELECTRIC FIELDS; EXCITED STATES; GROUND STATES; NEEL TEMPERATURE; PRASEODYMIUM COMPOUNDS; QUADRUPOLES; SILICON COMPOUNDS; TEMPERATURE RANGE 0013-0065 K; ULTRASONIC TESTING
Descriptors DEC
ACOUSTIC TESTING; ENERGY LEVELS; MATERIALS TESTING; MECHANICAL PROPERTIES; MULTIPOLES; NONDESTRUCTIVE TESTING; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; TEMPERATURE RANGE; TESTING; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE