Grain boundary ferromagnetism in vanadium-doped In$_2$O$_3$ thin films

Qi Feng; Harry J Blythe; A Mark Fox; Xiu-Fang Qin; Xiao-Hong Xu; Steve M Heald; Gillian A Gehring

doi:10.1209/0295-5075/103/67007

Grain boundary ferromagnetism in vanadium-doped In$_2$O$_3$ thin films

Materials Science 2015-06-17 v1

Authors: Qi Feng , Harry J Blythe , A Mark Fox , Xiu-Fang Qin , Xiao-Hong Xu , Steve M Heald , Gillian A Gehring

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Abstract

Room temperature ferromagnetism was observed in In $_2$ O $_3 thin films doped with 5 at.% vanadium, prepared by pulsed laser deposition at substrate temperatures ranging from 300 to 600$ \,^{\circ}{\rm C} $. X-ray absorption fine structure measurement indicated that vanadium was substitutionally dissolved in the In$ _2 $O$ _3$ host lattice, thus excluding the existence of secondary phases of vanadium compounds. Magnetic measurements based on SQUID magnetometry and magnetic circular dichroism confirm that the magnetism is at grain boundaries and also in the grains. The overall magnetization originates from the competing effects between grains and grain boundaries.

Keywords

grain boundary ferromagnetism vanadium-doped In$_2$O$_3$ thin films pulsed laser deposition X-ray absorption fine structure SQUID magnetometry magnetic circular dichroism

Cite

@article{arxiv.1308.6492,
  title  = {Grain boundary ferromagnetism in vanadium-doped In$_2$O$_3$ thin films},
  author = {Qi Feng and Harry J Blythe and A Mark Fox and Xiu-Fang Qin and Xiao-Hong Xu and Steve M Heald and Gillian A Gehring},
  journal= {arXiv preprint arXiv:1308.6492},
  year   = {2015}
}

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12 pages, 7 figures, 1 table, accepted by Europhysics Letters

Grain boundary ferromagnetism in vanadium-doped In$_2$O$_3$ thin films

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