Perfect kagome-lattice antiferromagnets with J${}_{eff}$ = 1/2: The Co${}^{2+}$-analogs of copper minerals volborthite and vesignieite

Abstract

We report the synthesis, crystal structure, and magnetic properties of Co${}^{2+}$ kagome magnets Co${}_3$V${}_2$O${}_7$(OH)${}_2$$\cdot$2H${}_2$O and BaCo${}_3$(VO${}_4$)${}_2$(OH)${}_2$, which can be recognized as Co-analogues of the intensively researched quantum kagome magnet volborthite Cu${}_3$V${}_2$O${}_7$(OH)${}_2$$\cdot$2H${}_2$O and vesignieite BaCu${}_3$(VO${}_4$)${}_2$(OH)${}_2$. For each compound, the ground state is seemingly A-type antiferromagnetic order. At low temperatures, applying a magnetic field causes a metamagnetic-like transition described by the transition in which antiferromagnetically-aligned canted moments change to ferromagnetically-aligned ones. These ground and field-induced states include a canted ferromagnetic component perpendicular to the kagome planes favored by Dzyaloshinskii-Moriya interactions. These magnetic properties are well characterized by the J${}_{eff}$ = 1/2 physics. Our findings will be the first step toward clarifying the J${}_{eff}$ = 1/2 kagome physics, which has been little studied experimentally or theoretically.

9 pages, 7+1 figures, accepted for publication in Physical Review B

References in corpus (10)

• Spin chirality on a two-dimensional frustrated lattice
• 17O NMR study of the intrinsic magnetic susceptibility and spin dynamics of the quantum kagome antiferromagnet ZnCu3(OH)6Cl2
• Vesignieite BaCu3V2O8(OH)2 as a Candidate Spin-1/2 Kagome Antiferromagnet
• Kitaev-Heisenberg Hamiltonian for High-Spin $d^7$ Mott Insulators
• The magnetic groundstate of an experimental $S=1/2$ kagomé antiferromagnet
• One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite
• A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet
• Dzyaloshinskii-Moriya interaction and spin re-orientation transition in the frustrated kagome lattice antiferromagnet
• Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagomé lattice in CdCu${}_3$(OH)${}_6$(NO${}_3$)${}_2\cdot$H${}_2$O
• Spin-flip-driven giant magneto-transport in A-type antiferromagnet NaCrTe2

Cited by in corpus (6)

• Double magnetic transitions and exotic field induced phase in the triangular lattice antiferromagnets Sr${}_3$Co(Nb,Ta)${}_2$O${}_9$
• CaCo${}_2$TeO${}_6$: A topochemically prepared 3$d^7$ honeycomb Kitaev magnet
• Polymorphism and Magnetism in a Kitaev Honeycomb Cobaltate KCoAsO${}_4$
• Geometric frustration and Dzyaloshinskii-Moriya interactions in a quantum star lattice hybrid copper sulfate
• One-third magnetization plateau in a spin-1 kagome magnet BaNi${}_3$(AsO${}_4$)${}_2$(OH)${}_2$
• Crystalline water intercalation into the Kitaev honeycomb cobaltate Na${}_2$Co${}_2$TeO${}_6$