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Issue 7, 2019
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Impact of fluoride for hydroxide substitution on the magnetic properties of a Co-based single-ion magnet imbedded in the barium apatite crystal lattice

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Abstract

Cobalt-containing barium fluoro/hydroxy-apatites were prepared by a high-temperature solid state reaction in air. Cobalt ions are partially located in the trigonal channels of the apatite lattice, formally substituting the protons of hydroxide groups. The samples exhibit single-ion magnet features – slow relaxation of magnetization up to 40 K with parameters close to those in the parent cobalt-containing barium hydroxyapatite. A partial fluoride for hydroxide substitution (40%) facilitates the formation of the apatite phase, while the energy barrier for magnetization reversal retains its high value of 326 cm−1 and the irreversibility in low temperature magnetization is substantially increased. The 90% substitution results in the full disappearance of the high-energy single-ion magnetic centers, and the magnetic behavior suggests the presence of a high-spin cobalt ion in the +4 oxidation state.

Graphical abstract: Impact of fluoride for hydroxide substitution on the magnetic properties of a Co-based single-ion magnet imbedded in the barium apatite crystal lattice

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Publication details

The article was received on 30 Nov 2018, accepted on 18 Jan 2019 and first published on 18 Jan 2019


Article type: Paper
DOI: 10.1039/C8CE02042F
Citation: CrystEngComm, 2019,21, 1193-1199

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    Impact of fluoride for hydroxide substitution on the magnetic properties of a Co-based single-ion magnet imbedded in the barium apatite crystal lattice

    M. A. Zykin, A. A. Eliseev, M. A. Pogosova, L. A. Trusov, W. Schnelle, C. Felser, M. Jansen and P. E. Kazin, CrystEngComm, 2019, 21, 1193
    DOI: 10.1039/C8CE02042F

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