Perfect kagome-lattice antiferromagnets with J(eff)=1/2: The Co2+ analogs of the copper minerals volborthite and vesignieite

Article

关键词: MAGNETIC-PROPERTIES;    3-DIMENSIONAL VISUALIZATION;    SUPEREXCHANGE INTERACTION;    EXCHANGE INTERACTION;    CRYSTAL;    FERROMAGNETISM;    JAROSITES;   

DOI  :  10.1103/PhysRevB.106.214421

来源: SCIE

【 摘 要 】

We report the synthesis, crystal structure, and magnetic properties of Co2+ kagome magnets Co3V2O7(OH)(2)middot2H(2)O and BaCo3(VO4)(2)(OH)(2), which can be recognized as Co analogs of the intensively researched quantum kagome magnet volborthite Cu3V2O7(OH)(2)middot2H(2)O and vesignieite BaCu3(VO4)(2)(OH)(2). For each compound, the ground state is seemingly A-type antiferromagnetic order. At low temperatures, applying a magnetic field causes a metamagneticlike 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 a step toward clarifying the J(eff )= 1/2 kagome physics, which has not been thoroughly studied experimentally or theoretically.

【 授权许可】

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