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Antiferromagnetism of the cation-ordered warwickite system Mn2-xMgxBO4 (x=0.5, 0.6 and 0.7) / N. V. Kazak, N. A. Belskaya, E. M. Moshkina [et al.] // J. Magn. Magn. Mater. - 2020. - Vol. 507. - Ст. 166820, DOI 10.1016/j.jmmm.2020.166820. - Cited References: 39. - The reported study was funded by the Russian Foundation for Basic Research (no. 20-02-00559), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project. 18-42243007. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
   CRYSTAL-STRUCTURES
   SINGLE-CRYSTALS
   INSIGHTS
   MGFEBO4
Кл.слова (ненормированные):
Warwickites -- Antiferromagnet -- Cation ordering -- Jahn-Teller distortions
Аннотация: X-ray diffraction, heat capacity and magnetic measurements are performed on single crystals of Mn2-xMgxBO4 (x = 0.5, 0.6 and 0.7) with the warwickite structure. The monoclinic symmetry is found for all samples with the space group P21/n. The M1 site is occupied by trivalent Mn ions while the M2 site is occupied by a mixture of divalent Mg and Mn ions. Regular cation and charge distributions are observed, which is unusual for heterometallic warwickites. The local octahedral distortions of M1O6 show the monotonic dependence on the Mg content and are in accordance with the Jahn-Teller distortion. All samples are found to undergo long-range antiferromagnetic ordering with rather low transition temperatures of TN = 16, 14 and 13 K for x = 0.5, 0.6, and 0.7, respectively. The ordering of local octahedral distortions, caused by the strong electron-phonon interaction of the trivalent Mn ions, is proposed to stabilise the cationic ordering and, as a result, the long-range magnetic ordering in the material.

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Держатели документа:
FRC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
RAS, Zavoisky Phys Tech Inst, FRC Kazan Sci Ctr, Kazan, Russia.
Kazan Volga Reg Fed Univ, Kazan, Russia.

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Belskaya, N. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Sofronova, S. N.; Софронова, Светлана Николаевна; Eremina, R. M.; Eremin, E. V.; Еремин, Евгений Владимирович; Muftakhutdinov, A. R.; Cherosov, M. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-02-00559]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science to the research project [18-42243007]
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