Effects of hydrogen anneals on oxygen deficient SrTiO3-x single crystals

被引：42

作者：

Jalan, Bharat ^{[1
]}

Engel-Herbert, Roman ^{[1
]}

Mates, Thomas E. ^{[1
]}

Stemmer, Susanne ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2969037

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of hydrogen gas anneals on the electrical properties of nominally undoped, oxygen-deficient SrTiO(3-x) single crystals was investigated. Titanium getter layers and vacuum anneals were used to obtain oxygen-deficient SrTiO(3-x) with a low electrical resistivity. These crystals showed an optical absorption peak at 2.92 eV and strong midinfrared absorption. Subsequent anneals at 800 degrees C in forming gas, which contained 10% hydrogen, returned the crystals into the insulating, transparent state. The mechanisms by which hydrogen anneals can compensate for the effects of oxygen vacancies in SrTiO(3-x) are discussed. The results show that forming gas anneals of stoichiometric SrTiO(3) can lead to complex electrical conduction behavior.

引用

页数：3

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