Effect of magnesium doping on the orbital and magnetic order in LiNiO2

Abstract

In LiNiO2, the Ni3+ ions, with S=1/2 and twofold orbital degeneracy, are arranged on a trian- gular lattice. Using muon spin relaxation (MuSR) and electron spin resonance (ESR), we show that magnesium doping does not stabilize any magnetic or orbital order, despite the absence of interplane Ni2+. A disordered, slowly fluctuating state develops below 12 K. In addition, we find that magnons are excited on the time scale of the ESR experiment. At the same time, a g factor anisotropy is observed, in agreement with $|3z^2-r^2>$ orbital occupancy.

References in corpus (9)

• Spin-polarized muons in condensed matter physics
• Orbital degeneracy removed by charge order in triangular antiferromagnet AgNiO2
• Interlayer Magnetic Frustration in Quasi-stoichiometric Li1-xNi1+xO2
• Charge disproportionation and collinear magnetic order in the frustrated triangular antiferromagnet AgNiO2
• Ordering and Spin Waves in NaNiO2 : A Stacked Quantum Ferromagnet
• Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2
• Ground-state valency and spin configuration of the Ni-ions in nickelates
• Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2
• Spin excitations in the antiferromagnet NaNiO2

Cited by in corpus (5)

• First-principles theory of doping in layered oxide electrode materials
• Paraorbital ground state of trivalent Ni ion in LiNiO${}_2$ from DFT+DMFT calculations
• Spin-Orbital Entangled Liquid State in the Copper Oxide Ba${}_3$CuSb${}_2$O${}_9$
• Designing Quantum Spin-Orbital Liquids in Artificial Mott Insulators
• Magnetic phase diagram of the S=1/2 triangular layered compound NaNiO2: a single crystal study