Crystal structure and absence of magnetic order in single crystalline RuO${}_2$

Abstract

RuO${}_2$ was considered for a long time to be a paramagnetic metal with an ideal rutile-type structure down to low temperatures, but recent studies on single-crystals claimed evidence for antiferromagnetic order and some symmetry breaking in the crystal structure. We have grown single-crystals of RuO2 by vapor transport using either O${}_2$ or TeCl${}_4$ as transport medium. These crystals exhibit metallic behavior following a $T^2$ low-temperature relation and a small paramagnetic susceptibility that can be attributed to Pauli paramagnetism. Neither the conductance nor the susceptibility measurements yield any evidence for a magnetic or a structural transition between 300K and $\sim$4 K. Comprehensive single-crystal diffraction studies with neutron and X-ray radiation reveal the rutile structure to persist until 2K in our crystals, and show nearly perfect stoichiometry. Previous observations of symmetry forbidden reflections can be attributed to multiple diffraction. Polarized single-crystal neutron diffraction experiments at 1.6K exclude the proposed antiferromagnetic structures with ordered moments larger than 0.01 Bohr magnetons.

References in corpus (5)

• Antiferromagnetism in RuO${}_2$ as $d$-wave Pomeranchuk instability
• Itinerant Antiferromagnetism in RuO${}_2$
• Nonmagnetic Ground State in RuO${}_2$ Revealed by Muon Spin Rotation
• CaCrO3: an anomalous antiferromagnetic metallic oxide
• Multiband transport in RuO${}_2$

Cited by in corpus (19)

• Spin-Splitting Magnetoresistance in Altermagnetic RuO2 Thin Films
• Controlling photo-excited electron-spin by light-polarization in ultrafast-pumped altermagnets
• Symmetry-breaking induced surface magnetization in non-magnetic RuO${}_2$
• The Fermi surface of RuO2 measured by quantum oscillations
• Constraints on magnetism and correlations in RuO${}_2$ from lattice dynamics and Mössbauer spectroscopy
• Non-linear anomalous Edelstein response at altermagnetic interfaces
• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Electric and spin current vortices in altermagnets
• Observation of mirror-odd and mirror-even spin texture in ultrathin epitaxially strained RuO2 films
• Altermagnetism, ARPES, symmetry, non-relativistic band splitting
• Surface-Localized Magnetic Order in RuO2 Thin Films Revealed by Low-Energy Muon Probes
• Ferromagnetic interface engineering of spin-charge conversion in RuO${}_2$
• T-square electric resistivity and its thermal counterpart in RuO${}_2$
• Pressure-Induced Metal-Insulator and Paramagnet-Altermagnet Transitions in Rutile OsO2 Single Crystals
• Absence of magnetic order in epitaxial RuO2 revealed by X-ray linear dichroism
• Fermi-liquid behavior and characteristic temperature-dependent susceptibility in clean RuO${}_2$ crystal
• Absence of magnetic order and magnetic fluctuations in RuO${}_2$
• Moiré-resonant surface state in ultrathin RuO${}_2$
• Quantum oscillation fingerprints of altermagnetism in hole-doped RuO2