Spin-glass magnetic ordering in CoMgGaO2BO3 ludwigite
DOI (Low Temperature Physics):
https://doi.org/10.1063/1.3679627Ключові слова:
transition metal ludwigites, spin-glass freezing.Анотація
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 Å3 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.
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Опубліковано
2011-12-20
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N.B. Ivanova, M.S. Platunov, Yu.V. Knyazev, N.V. Kazak, L.N. Bezmaternykh, E.V. Eremin, and A.D. Vasiliev, Spin-glass magnetic ordering in CoMgGaO2BO3 ludwigite, Low Temp. Phys. 38, (2011) [Fiz. Nizk. Temp. 38, 214-217, (2011)] DOI: https://doi.org/10.1063/1.3679627.
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Низькотемпературний магнетизм
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