Magnetic and transport properties of Yb4Rh7Ge6 and Yb4Ir7Ge6

被引：10
作者：
Katoh, K
Abe, H
Negishi, D
Terui, G
Niide, Y
Ochiai, A
机构：
[1] Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan
[2] Tohoku Univ, Ctr Low Temp Sci, Sendai, Miyagi 9808578, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 279卷 / 01期
关键词：
magnetic properties; electrical resistivity; specific heat; Yb4Rb7Ge6; Yb4Ir7Ge6;
D O I：
10.1016/j.jmmm.2004.01.075
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Results of the magnetic susceptibility, magnetization, electrical resistivity and specific heat of single crystal Yb4Rh7Ge6 and polycrystal Yb4Ir7Ge6 are presented. Yb4Rh7Ge6 and Yb4Ir7Ge6 which crystallize in the cubic U4Re7Si6-type structure are metal and show paramagnetic behavior with the effective magnetic moments close to those of the free Yb3+ ion in the temperature range between 1.2 and 300K. At low temperatures, the values of the Sommerfeld coefficient estimated for Yb4Rh7Ge6 and Yb4Ir7Ge6 are the same degree as that of the non-magnetic references Lu4Rh7Ge6 and Lu4Ir7Ge6, respectively. The logarithmic increase of the electrical resistivity is absent in all temperature ranges. Yb4Rh7Ge6 and Yb4Ir7Ge6 are suggested to be not classified as heavy-fermion Kondo systems. Based on the results of the analysis of the magnetic susceptibility and specific heat, it was observed that the field dependence of the magnetization up to 5 T at low temperatures is well reproduced by a character of the doublet ground state. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：118 / 124
页数：7
相关论文
共 10 条
[1]   NEW SERIES OF GERMANIDES, ISOTYPES OF U4RE7SI6, THCR2SI2 AND CABE2GE2, IN R-T-GE TERNARY-SYSTEMS WHERE R IS AN ELEMENT OF RARE-EARTHS AND T = RU, OS, RH, IR - SUPRACONDUCTIVITY OF LAIR2GE2 [J].
FRANCOIS, M ;
VENTURINI, G ;
MARECHE, JF ;
MALAMAN, B ;
ROQUES, B .
JOURNAL OF THE LESS-COMMON METALS, 1985, 113 (02) :231-237
[2]   LOW-TEMPERATURE HEAT-CAPACITY STUDY OF SUPERCONDUCTING TERNARY SILICIDES AND GERMANIDES WITH THE SC5CO4SI10-TYPE STRUCTURE [J].
HAUSERMANNBERG, LS ;
SHELTON, RN .
PHYSICAL REVIEW B, 1987, 35 (13) :6659-6664
[3]   Electrical and magnetic properties of YbPdGe and YbPtGe [J].
Itoh, Y ;
Kadomatsu, H .
JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 280 (1-2) :39-43
[4]   Magnetic properties of YbTGe (T = Rh, Cu, Ag) [J].
Katoh, K ;
Mano, Y ;
Nakano, K ;
Terui, G ;
Niide, Y ;
Ochiai, A .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 268 (1-2) :212-218
[5]   Phases around the 1:1:1 composition in the Yb-Au-Ge and Ca-Au-Ge systems [J].
Merlo, F ;
Pani, M ;
Canepa, F ;
Fornasini, ML .
JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 264 (1-2) :82-88
[6]   The order of the palladium and germanium atoms in the germanides LnPdGe (Ln = La-Nd, Sm, Gd, Tb) and the new compound Yb3Pd4Ge4 [J].
Niepmann, D ;
Prots', YM ;
Pöttgen, R ;
Jeitschko, W .
JOURNAL OF SOLID STATE CHEMISTRY, 2000, 154 (02) :329-337
[7]  
SALAMAKHA PS, 1999, HDB PHYS CHEM RARE E, V27, P1
[8]   YbFeGe, a new structure type of equiatomic ternary germanides [J].
Sologub, O ;
Salamakha, P ;
Bocelli, G ;
Otani, S ;
Takabatake, T .
JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 312 (1-2) :196-200
[9]   20 NEW TERNARY GERMANIDES TR5T4GE10 OF TR-METALS OF RARE-EARTHS AND T = CO,RH,IR, - SUPERCONDUCTIVITY OF LU5RH4GE10 AND LU5IR4GE10 [J].
VENTURINI, G ;
MEOTMEYER, M ;
MCRAE, E ;
MARECHE, JF ;
ROQUES, B .
MATERIALS RESEARCH BULLETIN, 1984, 19 (12) :1647-1652
[10]   LOW-TEMPERATURE HEAT-CAPACITY OF SUPERCONDUCTING TERNARY IRON SILICIDES [J].
VINING, CB ;
SHELTON, RN ;
BRAUN, HF ;
PELIZZONE, M .
PHYSICAL REVIEW B, 1983, 27 (05) :2800-2806
1