Hydrogenation and physical properties of the ternary germanide CeCoGe: an anisotropic expansion of the unit cell

被引：20

作者：

Chevalier, B ^{[1
]}

Gaudin, E ^{[1
]}

Weill, F ^{[1
]}

Bobet, JL ^{[1
]}

机构：

[1] Univ Bordeaux 1, CNRS, UPR 9048, ICMCB, F-33608 Pessac, France

来源：

INTERMETALLICS | 2004年 / 12卷 / 04期

关键词：

rare-earth intermetallics; crystal chemistry of intermetallics; magnetic properties; diffraction; (electron; neutron and X-ray);

D O I：

10.1016/j.intermet.2003.12.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ternary germanide CeCoGe and its hydride CeCoGeH crystallize in the tetragonal CeFeSi-type structure but the hydrogenation induces an anisotropic expansion of the unit cell parameters: a decreases (-3.1 %) whereas c increases (+ 12.7%). These structural changes suggest that the hydrogen atoms occupy the [Ce-4] tetrahedral sites empty in CeCoGe. Magnetization and electrical resistivity measurements evidence an interesting transition from antiferromagnetic ordering [CeCoGe; T-N 5.0(2) K] to spin fluctuation behaviour [CeCoGeH; T-sf = 13.3(5) K]. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：437 / 442

页数：6

共 15 条

[1]

[Anonymous], 2000, CRYSTALLOGRAPHIC COM

[2] Structural and hydrogen sorption studies of NdNi5-xAlx and GdNi5-xAlx [J].

Bobet, JL ;

Pechev, S ;

Chevalier, B ;

Darriet, B .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 267 (1-2) :136-141

[3] Ferromagnetic behavior of the new hydride CeNiSnH1.8(2) [J].

Chevalier, B ;

Bobet, JL ;

Pasturel, M ;

Bauer, E ;

Weill, F ;

Decourt, R ;

Etourneau, J .

CHEMISTRY OF MATERIALS, 2003, 15 (11) :2181-2185

[4] Occurrence of ferromagnetic transition on hydrogen insertion in the ternary indide CeNiIn [J].

Chevalier, B ;

Kahn, ML ;

Bobet, JL ;

Pasturel, M ;

Etourneau, J .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (20) :L365-L368

[5] The ternary gallide CeNiGa: Polymorphism and hydrogen absorption [J].

Chevalier, B ;

Bobet, JL ;

Gaudin, E ;

Pasturel, M ;

Etourneau, J .

JOURNAL OF SOLID STATE CHEMISTRY, 2002, 168 (01) :28-33

[6]

CHEVALIER B, UNPUB J ALLOYS COMP

[7] INFLUENCE OF CRYSTALLINE FIELD ON KONDO EFFECT OF ALLOYS AND COMPOUNDS WITH CERIUM IMPURITIES [J].

CORNUT, B ;

COQBLIN, B .

PHYSICAL REVIEW B, 1972, 5 (11) :4541-&

[8] An intensity evaluation method:: EVAL-14 [J].

Duisenberg, AJM ;

Kroon-Batenburg, LMJ ;

Schreurs, AMM .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2003, 36 :220-229

[9] MAGNETIC-PROPERTIES OF CECO2GE2 AND NDCO2GE2 SINGLE-CRYSTALS [J].

FUJII, H ;

UEDA, E ;

UWATOKO, Y ;

SHIGEOKA, T .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 76-7 :179-181

[10] RARE EARTH-HYDROGEN SYSTEMS .I. STRUCTURAL AND THERMODYNAMIC PROPERTIES [J].

KORST, WL ;

WARF, JC .

INORGANIC CHEMISTRY, 1966, 5 (10) :1719-&

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