Electronic and magnetic properties of Nd1-xSrxMnAsO oxyarsenides

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The oxypnictides Nd1-xSrx MnAsO have been successfully synthesized with x up to 0.1. A synchrotron x-ray diffraction study demonstrates that there is no change in crystal symmetry upon doping with Sr. An expansion of the interlayer distance between Nd-O-Nd and As-Mn-As blocks is observed with increasing x. Results from variable temperature neutron diffraction and resistivity measurements show that the local moment antiferromagnetic order of the Mn spins is preserved as the [MnAs]-layers are hole doped and the materials are driven metallic for x >= 0.05. A sizable positive magnetoresistance is observed at low temperature which demonstrates that multiple MR mechanisms are possible in LnMnAsO oxypnictides.
Original languageEnglish
Article number224413
JournalPhysical Review B Condensed Matter and Materials Physics
Volume90
Issue number22
DOIs
Publication statusPublished - 8 Dec 2014

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Electronic properties
neutron diffraction
interlayers
Magnetic properties
synchrotrons
x ray diffraction
magnetic properties
moments
electrical resistivity
expansion
Crystal symmetry
symmetry
Magnetoresistance
Neutron diffraction
Synchrotrons
electronics
crystals
Diffraction
Doping (additives)
X rays

Keywords

  • Magnetoresistance
  • Oxypnictide
  • Magnetism

Cite this

Electronic and magnetic properties of Nd1-xSrxMnAsO oxyarsenides. / McLaughlin, Abbie; Wildman, Eve Jennifer; Emery, Nicolas.

In: Physical Review B Condensed Matter and Materials Physics , Vol. 90, No. 22, 224413, 08.12.2014.

Research output: Contribution to journalArticle

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AB - The oxypnictides Nd1-xSrx MnAsO have been successfully synthesized with x up to 0.1. A synchrotron x-ray diffraction study demonstrates that there is no change in crystal symmetry upon doping with Sr. An expansion of the interlayer distance between Nd-O-Nd and As-Mn-As blocks is observed with increasing x. Results from variable temperature neutron diffraction and resistivity measurements show that the local moment antiferromagnetic order of the Mn spins is preserved as the [MnAs]-layers are hole doped and the materials are driven metallic for x >= 0.05. A sizable positive magnetoresistance is observed at low temperature which demonstrates that multiple MR mechanisms are possible in LnMnAsO oxypnictides.

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