Magnetic and structural changes in LaCo0.9Mn0.1O3 at high pressure

M. Capone, C. J. Ridley, N. P. Funnell, G. B.G. Stenning, J. S. Loveday, M. Guthrie, C. L. Bull

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Abstract

The structural and magnetic properties of LaCo0.9Mn0.1O3 have been studied as a function of pressure by neutron powder diffraction and DC magnetometry. The material is confirmed to exhibit rhombohedral R c symmetry between ambient pressure and 6 GPa. We have determined the bulk modulus B 0 of the sample using a second-order Birch-Murnaghan equation of state which yielded: B 0 = 140(9) GPa and V . We report a non-linear increase of the Curie temperature T C from an ambient pressure value of 224.7 K to ∼236 K at a pressure of 4 GPa. Finally, we confirm the glassy-like nature of the magnetism in LaCo0.9Mn0.1O3, which is maintained throughout the pressure range explored.

Original languageEnglish
Article number035402
JournalJournal of Physics Condensed Matter
Volume30
Issue number3
DOIs
StatePublished - Jan 24 2018
Externally publishedYes

Funding

We acknowledge the Science and Technology Facilities Council for providing access to the PEARL instrument at ISIS and facilities provided within the Materials Characterisation Laboratory. We also acknowledge the European Spallation Source and ISIS/STFC for funding to M Capone.

Keywords

  • high-pressure
  • magnetism
  • neutron-diffraction
  • perovskite

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