CeIrGaHy system:: hydrogen induced structural and valence change

被引：22

作者：

Raj, P ^{[1
]}

Sathyamoorthy, A

Shashikala, K

Rao, CRV

Malik, SK

机构：

[1] Bhabha Atom Res Ctr, Novel Mat & Struct Chem Div, Bombay 400085, Maharashtra, India

[2] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

SOLID STATE COMMUNICATIONS | 2001年 / 120卷 / 9-10期

关键词：

crystal structure and symmetry; valence fluctuations; phase transitions;

D O I：

10.1016/S0038-1098(01)00393-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

CeIrGa is shown to be a mixed-valent compound with very high Kondo temperature (approximate to 1000 K). From the hydriding studies on CeIrGa. it is found that (i) only single hydride phase with hydrogen to metal ratio congruent to 1.7 is stabilized, which involves change of crystalline structure from orthorhombic (epsilon -TiNiSi type, space group Pnma) to hexagonal (B8(2) type, space group P6(3)/mmc) and (ii) charge state of cerium changes from mixed-valent to Ce+3 state, though no magnetic ordering is observed down to 2 K. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：375 / 378

页数：4

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