Segregation of Mn2+ dopants as interstitials in SrTiO3 grain boundaries

Hao Yang, Paul G. Kotula, Yukio Sato, Miaofang Chi, Yuichi Ikuhara, Nigel D. Browning

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8 Citations (Scopus)

Abstract

Mn-doped SrTiO3 shows promising magnetic and electrical properties, but the doping mechanism remains unclear. In this research Mn4 + is found to substitute Ti in bulk SrTiO3, but Mn2 + segregates inside grain boundaries at both Sr and interstitial sites. Mn interstitial doping has never been reported, but is found possible with the formation of Sr vacancies. This finding is significantly different from the amphoteric doping of Mn2 + substituting Sr and Mn4 + substituting Ti sites, therefore leads to different understanding on the defect mediated electrical and magnetic properties of transition metal-doped perovskites.

Original languageEnglish
Pages (from-to)16-22
Number of pages7
JournalMaterials Research Letters
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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