Ordering and Spin Waves in NaNiO2 : A Stacked Quantum Ferromagnet

Abstract

Neutron scattering measurements on powder NaNiO2 reveal magnetic Bragg peaks and spin waves characteristic of strongly correlated s=1/2 magnetic moments arranged in ferromagnetic layers which are stacked antiferromagnetically. This structure lends itself to stacking sequence frustration in the presence of mixing between nickel and alkali metal sites, possibly providing a natural explanation for the enigmatic spin glass state of the isostructural compound, LiNiO2.

6 pages, 5 figures, RevTex4, for higher resolution figures see published version

References in corpus (8)

• Quantum Melting of Magnetic Order due to Orbital Fluctuations
• SU(4) Theory for Spin Systems with Orbital Degeneracy
• Orbital ordering in frustrated Jahn-Teller systems
• Orbital degeneracy as a source of frustration in LiNiO${}_2$
• Orbital frustration at the origin of the magnetic behavior in LiNiO2
• Quantum melting of magnetic long-range order near orbital degeneracy. Classical phases and Gaussian fluctuations
• Interlayer Magnetic Frustration in Quasi-stoichiometric Li1-xNi1+xO2
• Spontaneous plaquette formation in the SU(4) Spin-Orbital ladder

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• Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2
• Magnetic properties of spin-orbital polarons in lightly doped cobaltates
• Spin dynamics of frustrated easy-axis triangular antiferromagnet 2H-AgNiO2 explored by inelastic neutron scattering
• Ground-state valency and spin configuration of the Ni-ions in nickelates
• Effect of magnesium doping on the orbital and magnetic order in LiNiO2
• Spin excitations in the antiferromagnet NaNiO2
• The emergence of Resonating Valence Bond physics in spin-orbital models
• Designing Quantum Spin-Orbital Liquids in Artificial Mott Insulators
• Honeycomb Layered Frameworks with Metallophilic Bilayers
• Mean-field Study of Charge, Spin, and Orbital Orderings in Triangular-lattice Compounds ANiO2 (A=Na, Li, Ag)
• Magnetic phase diagram of the S=1/2 triangular layered compound NaNiO2: a single crystal study