Electronic and crystal structure of α- and β-CeIr2Si2

被引：18
作者：
Mihalik, M. [1 ]
Divis, M. [1 ]
Sechovsky, V. [1 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, Dept Condensed Matter Phys, CR-12116 Prague 2, Czech Republic
来源：
PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 19期
关键词：
REr2Si2; Magnetization; Specific heat; Non-Fermi-liquid behavior; QUANTUM CRITICAL-POINT; FERMI-LIQUID BEHAVIOR; MAGNETIC-PROPERTIES;
D O I：
10.1016/j.physb.2009.07.052
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We present the results of XRD, magnetization, resistivity and specific heat measurements of CeIr2Si2 single crystals for both, the low-temperature alpha-phase and the high-temperature beta-phase. respectively. The alpha-phase adopts the tetragonal ThCr2Si2-type whereas the beta-phase forms in the CaBe2Ge2-type structure. Both the phases remain paramagnetic down to low temperatures, nevertheless both, the magnetization and resistivity exhibit pronounced anisotropy in the whole temperature range of measurements (2-300K). Results of fitting the temperature dependence of the susceptibility within the interconfiguration-fluctuation model point to the Ce valence fluctuating between 3+ and 4+. The alpha-phase behaves as a Fermi-liquid (FL) at low temperatures whereas the beta-phase exhibits non-Fermi-liquid (NFL) features. The results are discussed in context of other similar polymorphic compounds. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：3191 / 3194
页数：4
相关论文
共 13 条
[1]   Large thermoelectric power in several metallic compounds of cerium and uranium [J].
Bando, Y ;
Suemitsu, T ;
Takagi, K ;
Tokushima, H ;
Echizen, Y ;
Katoh, K ;
Umeo, K ;
Maeda, Y ;
Takabatake, T .
JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 313 (1-2) :1-6
[2]   POLYMORPHISM AND SUPERCONDUCTIVITY OF LAIR2SI2 [J].
BRAUN, HF ;
ENGEL, N ;
PARTHE, E .
PHYSICAL REVIEW B, 1983, 28 (03) :1389-1395
[3]  
ELGHADRAOUI EH, 1988, MAT RES B, V32, P1345
[4]   STRUCTURAL AND MAGNETIC-PROPERTIES OF UCO2GE2 [J].
ENDSTRA, T ;
NIEUWENHUYS, GJ ;
MENOVSKY, AA ;
MYDOSH, JA .
JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) :4816-4818
[5]   Pressure induced quantum critical point and non-Fermi-liquid behavior in BaVS3 [J].
Forró, L ;
Gaál, R ;
Berger, H ;
Fazekas, P ;
Penc, K ;
Kézsmárki, I ;
Mihály, G .
PHYSICAL REVIEW LETTERS, 2000, 85 (09) :1938-1941
[6]   INTERMEDIATE VALENCE ON DILUTE EUROPIUM IONS [J].
FRANZ, W ;
STEGLICH, F ;
ZELL, W ;
WOHLLEBEN, D ;
POBELL, F .
PHYSICAL REVIEW LETTERS, 1980, 45 (01) :64-67
[7]   MAGNETIC-BEHAVIOR OF TERNARY SILICIDES CET2SI2 (T=RU, RH, PD, OS, IR, PT) AND BORON SUBSTITUTION IN CE]RU, OS[2SI2-XBX [J].
HIEBL, K ;
HORVATH, C ;
ROGL, P .
JOURNAL OF THE LESS-COMMON METALS, 1986, 117 (1-2) :375-383
[8]   Low dimensional intermediate valence fluctuation in single crystalline YbB4 [J].
Kim, J. Y. ;
Cho, B. K. ;
Lee, H. J. ;
Kim, H.-C. .
JOURNAL OF APPLIED PHYSICS, 2007, 101 (09)
[9]   Anisotropic transport and magnetic properties of frustrated CeRhSn [J].
Kim, MS ;
Echizen, Y ;
Umeo, K ;
Tayama, T ;
Sakakibara, T ;
Takabatake, T .
PHYSICA B-CONDENSED MATTER, 2003, 329 :524-525
[10]   Non-Fermi-liquid behaviour around the magnetic quantum critical point in UGa3 [J].
Nakashima, M ;
Haga, Y ;
Honda, F ;
Eto, T ;
Oomi, G ;
Kagayama, T ;
Takeshita, N ;
Nakanishi, T ;
Môri, N ;
Aoki, D ;
Settai, R ;
Onuki, Y .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (24) :L569-L576
12