Strongly canted antiferromagnetic ground state in Cu3(OH)2F4статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 16 января 2019 г.
Аннотация:An unique crystal structure of copper hydroxyl-fluorite, Cu3(OH)2F4, hosts the
trimerized chains of both edge-sharing and corner-sharing CuO2F2 plaquettes. The results of the
comprehensive study of this compound, including new synthetic route, measurements of specific
heat, ac- and dc-susceptibility, pulsed field magnetization, electron spin resonance, muon spin
rotation and relaxation and first principles calculations are presented. The data evidence
magnetic phase transition at TC = 12.5 K into canted antiferromagnetic state which is due to
antisymmetric Dzyaloshinskii-Moriya (DM) exchange interaction. No alteration of DM
component stemming from the intrinsic features of the crystal lattice in Cu3(OH)2F4 results in
unusually large spontaneous magnetization. At T < TC, the remanence MR constitutes significant
portion of saturation magnetization MS which defines the canting angle ϕ = 4°.