Оптические и магнитные свойства наноматериалов на основе ортоферрита NdFeO3, синтезированных методом совместного осаждения
Аннотация
В работе описан процесс синтеза наноматериалов (размер частиц от 20 до 40 нм) на основе ортоферрита NdFeO3 методом совместного осаждения посредством гидролиза катионов Nd(III) и Fe(III) в горячей воде с 5 % раствором NaOH в качестве осаждающего реактива. Однофазный NdFeO3 был получен в результате кальцинации порошка непосредственно после отжига при температуре 700, 800 и 900 °C в течение часа. При комнатной температуре наблюдалось сильное поглощение излучения в ультрафиолетовом и видимом диапазоне (l = 200–400 и 400–600 нм),
а также низкое значение ширины запрещённой зоны (Eg = 2.2÷2.5 эВ). Полученные наноматериалы на основе NdFeO3 проявляют свойства магнитотвердых ферромагнетиков с высокой коэрцитивной силой (Hc = 600–1600 Э).
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