Optical and electrical changes of hydrogenated Dy films

被引：17

作者：

Azofeifa, DE ^{[1
]}

Clark, N

机构：

[1] Univ Costa Rica, CICIMA, San Jose, Costa Rica

[2] Univ Costa Rica, Escuela Fis, San Jose, Costa Rica

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 305卷 / 1-2期

关键词：

dysprosium; metal hydrides; rare earth; films; Hall effect;

D O I：

10.1016/S0925-8388(00)00739-8

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：

Electrical and optical measurements on hydrogenated Pd coated (20 nm) Dy films (250-300 nm) are presented. The films are prepared in a high vacuum chamber and hydrogenated, at room temperature, by exposing them to a hydrogen atmosphere. Maximum hydrogen concentration of the order of 3 is achieved as measured by QCM. Changes in electrical resistance and optical transmission (at lambda=632.8 nm) in the films indicate the dielectric nature of the DyH3. The Hall coefficient measured also as a Function of concentration, gives an insight into the evolution of the density of charge carriers as hydrogen is absorbed. (C) 2000 Elsevier Science S.A. All rights reserved.

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页码：32 / 34

页数：3

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