TY - JOUR
T1 - Segregation of Mn2+ dopants as interstitials in SrTiO3 grain boundaries
AU - Yang, Hao
AU - Kotula, Paul G.
AU - Sato, Yukio
AU - Chi, Miaofang
AU - Ikuhara, Yuichi
AU - Browning, Nigel D.
N1 - Funding Information:
Acknowledgements This work is supported by the US Department of Energy Grant No. DE-FG02-03ER46057. A part of the work was conducted in the ShaRE user facility at Oak Ridge National Laboratory, and in the Research Hub for Advanced NanoCharacterization, The University of Tokyo, supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The research described in this paper is part of the Chemical Imaging Initiative at PNNL under Contract DE-AC05-76RL01830 operated for DOE by Battelle. A portion of the research was performed using EMSL, a national scientific user facility sponsored by the Department of Energy’s Office of Biological and Environmental Research and located at PNNL.
Publisher Copyright:
© 2013.
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
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U2 - 10.1080/21663831.2013.856815
DO - 10.1080/21663831.2013.856815
M3 - Article
AN - SCOPUS:85011890539
SN - 2166-3831
VL - 2
SP - 16
EP - 22
JO - Materials Research Letters
JF - Materials Research Letters
IS - 1
ER -