Тип публикации: статья из журнала
Год издания: 2026
Идентификатор DOI: 10.1016/j.jmmm.2026.173900
Аннотация: Single crystals of spinel FeMnO were prepared by the flux method using a solvent based on BiMoO12-BO-NaO with the addition of gallium oxide GaO. The structural features of the obtained samples were studied by powder and single crystal X-ray diffraction analysis. According to EDX data, the obtained FeMnO crystals contain gallium in Показать полностьюthe amount of 12% per formula unit. Differential scanning calorimetry, specific heat study and temperature and field dependences of magnetization of the obtained single crystal showed a significant reduction of the ferrimagnetic phase transition ( = 380 K) relative the parent FeMnO compound ( = 560–580 K). The observed feature is, to a large extent, affected by the Fe/Mn/Ga ratio and demonstrates the possibility of the tuning the ferrimagnetic transition temperature over a wide temperature range. The flux technique for the single crystals synthesis enables precise variation of the Ga, Mn and Fe concentration in the (Fe,Mn,Ga)O allowing one to create the material with the needed magnetic properties. The obtained spinel compound was studied in a wide temperature range: 300–770 K by DSC and 4.2–600 K by magnetization measurements. Along with the high-temperature ferrimagnetic phase transition, anomalies of the temperature dependence of the magnetization in small fields (about = 50–100 Oe) accompanied by significant thermal hysteresis were detected in the ordered phase at much lower temperatures about = 150–170 K that has not been observed in the other relative compositions.
Журнал: Journal of Magnetism and Magnetic Materials
Выпуск журнала: Т. 642
Номера страниц: 173900
ISSN журнала: 03048853
Издатель: Elsevier Science Publishing Company, Inc.