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Magnetic and electronic ordering phenomena in the Ru2 O6 -layer honeycomb lattice compound AgRuO3

Schnelle, W and Prasad, BE and Felser, C and Jansen, M and Komleva, EV and Streltsov, SV and Mazin, II and Khalyavin, D and Manuel, P and Pal, S and Muthu, DVS and Sood, AK and Klyushina, ES and Lake, B and Orain, J-C and Luetkens, H (2021) Magnetic and electronic ordering phenomena in the Ru2 O6 -layer honeycomb lattice compound AgRuO3. In: Physical Review B, 103 (21).

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Official URL: https://doi.org/10.1103/PhysRevB.103.214413


The silver ruthenium oxide AgRuO3 consists of honeycomb Ru25+O62- layers and can be considered an analogue of SrRu2O6 with a different intercalation. We present measurements of magnetic susceptibility and specific heat on AgRuO3 single crystals, which reveal a sharp antiferromagnetic transition at 342(3) K. The electrical transport in single crystals of AgRuO3 is determined by a combination of activated conduction over an intrinsic semiconducting gap of �100 meV and carriers trapped and thermally released from defects. From powder neutron diffraction data a Néel-type antiferromagnetic structure with the Ru moments along the c axis is derived. Raman spectroscopy on AgRuO3 single crystals and muon spin rotation spectroscopy on powder samples indicate a further weak phase transition or a crossover in the temperature range 125-200 K. The transition does not show up in the magnetic susceptibility, and its origin is argued to be related to defects but cannot be fully clarified. The experimental findings are complemented by density-functional-theory-based electronic structure calculations. It is found that the magnetism in AgRuO3 is similar to that in SrRu2O6, however, with stronger intralayer and weaker interlayer magnetic exchange interactions. © 2021 authors. Published by the American Physical Society.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to Authors
Keywords: Antiferromagnetism; Defects; Density functional theory; Electronic structure; Honeycomb structures; Magnetic susceptibility; Single crystals; Specific heat of solids; Strontium compounds, Antiferromagnetic structures; Antiferromagnetic transition; Electrical transport; Electronic ordering; Electronic structure calculations; Honeycomb lattices; Magnetic exchange interactions; Powder neutron diffraction data, Ruthenium compounds
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 26 Aug 2021 10:53
Last Modified: 26 Aug 2021 10:53
URI: http://eprints.iisc.ac.in/id/eprint/69323

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