Spin-glass magnetic ordering in CoMgGaO₂BO₃ ludwigite

• Veröffentlicht in: Физика низких температур
• Datum: 2012
• Hauptverfasser: Ivanova, N.B., Platunov, M.S., Knyazev, Yu.V., Kazak, N.V., Bezmaternykh, L.N., Eremin, E.V., Vasiliev, A.D.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2012
• Schlagworte: Низкотемпеpатуpный магнетизм
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/116844
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Spin-glass magnetic ordering in CoMgGaO₂BO₃ ludwigite / N.B. Ivanova, M.S. Platunov, Yu.V. Knyazev, N.V. Kazak, L.N. Bezmaternykh, E.V. Eremin, and A.D. Vasiliev // Физика низких температур. — 2012. — Т. 38, № 2. — С. 214-217. — Бібліогр.: 13 назв. — англ.

The single crystal needle shape samples of diamagnetically diluted cobalt ludwigite CoMgGaO₂BO₃ have been grown by the flux method. The results of x-ray diffraction and both dc and ac magnetic measurements are presented. The unit cell volume undergoes a noticable growth under dilution from 328.31 Å3 for the parent compound Co₃O₂BO₃ to 345.46 ų for CoMgGaO₂BO₃. The temperature of magnetic transition is considerably lower for the latter compound (25 K against 43 K for Co₃O₂BO₃). The dc magnetization temperature dependencies undergo the splitting of field cooled and zero-field cooled regimes and the ac magnetic susceptibility temperature dependencies are frequency dependent pointing out a possible spin-glass freezing in the magnetic system.