Cascade of field-induced magnetic transitions in a frustrated antiferromagnetic metal

Abstract

Frustrated magnets can exhibit many novel forms of order when exposed to high magnetic fields, however, much less is known about materials where frustration occurs in the presence of itinerant electrons. Here we report thermodynamic and transport measurements on micron-sized single crystals of the triangular-lattice metallic antiferromagnet 2H-AgNiO2, in magnetic fields of up to 90 T and temperatures down to 0.35 K. We observe a cascade of magnetic phase transitions at 13.5 20, 28 and 39T in fields applied along the easy axis, and we combine magnetic torque, specific heat and transport data to construct the field-temperature phase diagram. The results are discussed in the context of a frustrated easy-axis Heisenberg model for the localized moments where intermediate applied magnetic fields are predicted to stabilize a magnetic supersolid phase. Deviations in the measured phase diagram from this model predictions are attributed to the role played by the itinerant electrons.

arXiv commentpossible experimental signature of a magnetic supersolid phase

References in corpus (9)

• Electronic structure and magnetism in Ru based perovskites
• Spin-flop transition in uniaxial antiferromagnets: magnetic phases, reorientation effects, multidomain states
• Orbital degeneracy removed by charge order in triangular antiferromagnet AgNiO2
• Spin-1/2 Triangular Lattice with Orbital Degeneracy in a Metallic Oxide Ag2NiO2
• Charge disproportionation and collinear magnetic order in the frustrated triangular antiferromagnet AgNiO2
• Competition between supersolid phases and magnetisation plateaux in the frustrated easy-axis antiferromagnet on a triangular lattice
• Spin dynamics of frustrated easy-axis triangular antiferromagnet 2H-AgNiO2 explored by inelastic neutron scattering
• Direct observation of charge order in triangular metallic AgNiO2 by single-crystal resonant X-ray scattering
• Supersolid phases in a realistic three-dimensional spin model

Cited by in corpus (12)

• The properties of ultrapure delafossite metals
• Half-magnetization plateau and the origin of threefold symmetry breaking in an electrically-switchable triangular antiferromagnet
• Half-magnetization plateau in a Heisenberg antiferromagnet on a triangular lattice
• Magnetic field effects on the quantum spin liquid behaviors of NaYbS${}_2$
• Metallic delafossite thin films for unique device applications
• Symmetry breaking and fermionic fractional Chern insulator in topologically trivial bands
• The Fermi surface of PtCoO2 from quantum oscillations and electronic structure calculations
• Magnetic phase diagram of a 2-dimensional triangular lattice antiferromagnet Na${}_2$BaMn(PO${}_4$)${}_2$
• Field-induced spin level crossings within a quasi-XY antiferromagnetic state in Ba${}_2$FeSi${}_2$O${}_7$
• Pinball liquid phase from Hund's coupling in frustrated transition metal oxides
• Anisotropic magnetic interactions in a candidate Kitaev spin liquid close to a metal-insulator transition
• Diffusion-assisted molecular beam epitaxy of CuCrO${}_2$ thin films