| Issue |
Europhys. Lett.
Volume 33, Number 8, March II 1996
|
|
|---|---|---|
| Page(s) | 647 - 652 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00393-0 | |
| Published online | 01 September 2002 | |
Anomalous low-temperature magnetic behaviour in DyRu2Si2 and DyRu2Ge2
1
Laboratoire de Magnétisme Louis Néel, CNRS, BP 166, 38042 Grenoble
Cédex 9, France
2
Instituto de Fisica, UFRGS - P.O. Box 15051, 91501-970 Porto Alegre, Brazil
3
Department of Physics, Faculty of Science, Yamaguchi
University, Yamaguchi 753, Japan
Received:
6
November
1995
Accepted:
25
January
1996
The body-centred tetragonal compounds DyRu2Si2 and 
order within a collinear modulated magnetic structure at
and 22 K, respectively. Below 
, both
compounds present a low-field low-temperature magnetic state which
exhibits several non-conventional features. The most spectacular one is
a double-peak structure in the temperature dependence of the specific
heat, associated with a giant variation of the magnetic entropy. Other
anomalous characteristics include an unexpected change of behaviour in
the magnetization processes and an unusual variation of the resistivity
in this temperature range. The nature of this low-temperature phase is a
puzzle.
PACS: 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) / 75.40.Cx – Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
© EDP Sciences, 1996
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