Strongly canted antiferromagnetic ground state in Cu3(OH)2F4

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...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-03, Vol.776, p.16-21
Main Authors: Danilovich, Igor L., Merkulova, Anna V., Morozov, Igor V., Ovchenkov, Evgeniy A., Spiridonov, Felix M., Zvereva, Elena A., Volkova, Olga S., Mazurenko, Vladimir V., Pchelkina, Zlata V., Tsirlin, Alexander A., Balz, Christian, Holenstein, Stefan, Luetkens, Hubertus, Shakin, Alexander A., Vasiliev, Alexander N.
Format: Article
Language:English
Subjects:
Canted antiferromagnetism
Cu3(OH)2F4
Polyanion compound
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Summary: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 
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.10.032