Structural, optical and electronic properties of LaMgHx switchable mirrors

被引：34

作者：

Isidorsson, J ^{[1
]}

Giebels, IAME ^{[1
]}

Kooij, ES ^{[1
]}

Koeman, NJ ^{[1
]}

Rector, JH ^{[1
]}

van Gogh, ATM ^{[1
]}

Griessen, R ^{[1
]}

机构：

[1] Vrije Univ Amsterdam, Fac Sci, Div Phys & Astron, NL-1081 HV Amsterdam, Netherlands

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 13-14期

关键词：

LaMg hydride; metal-insulator transition; switchable mirror; X-ray; optical properties;

D O I：

10.1016/S0013-4686(01)00373-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Structural, optical and electronic properties of lanthanum magnesium alloy thin films are studied in situ in real time during hydrogenation. X-ray data show that the as-deposited films contain the intermetallic phase LaMg with CsCl structure as well as fee beta -La and fee LaHx. Hydrogenation initiates a transformation of beta -La to beta -LaHx, while the intermetallic phase disproportionates. The fee structure stays intact during further uptake of hydrogen up to LaH3, and Mg transforms to the rutile structure of MgH2. During hydrogen absorption the alloys change from a good conducting, metallic state with high reflectance, to a transparent color neutral insulator with a band-gap of about 3 eV. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2179 / 2185

页数：7

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