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

Bharat Jalan, Roman Engel-Herbert, Thomas E. Mates, Susanne Stemmer

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37 Scopus citations


The influence of hydrogen gas anneals on the electrical properties of nominally undoped, oxygen-deficient SrTiO3-x single crystals was investigated. Titanium getter layers and vacuum anneals were used to obtain oxygen-deficient SrTiO3-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 °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 SrTiO3-x are discussed. The results show that forming gas anneals of stoichiometric SrTiO3 can lead to complex electrical conduction behavior.

Original languageEnglish (US)
Article number052907
JournalApplied Physics Letters
Issue number5
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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