Rapidly quenched (RQ) alloys R 12 Fe 82 B 6 (R = Nd, Er) have been prepared by melt spinning. Their magnetic properties, structure, and phase composition have been studied before and after fast neutron irradiation to a fluence of 1.2 × 10 20 n/cm 2 . Before irradiation, it is the Nd 2 Fe 14 B type phase (space group P4 2 /mnm) that is mainly present in the RQ alloys at 295 K. In the Nd 12 Fe 82 B 6 alloy, this phase has a ferro magnetic structure with magnetic moments at the Nd and Fe atoms oriented parallel to the c axis; the Er 2 Fe 14 B phase found in the Er 12 Fe 82 B 6 alloy is characterized by a ferrimagnetic order of Er and Fe magnetic moments parallel to the basal plane. After irradiation, the crystalline state of both RQ alloys transforms into an amorphous state. The ferro and ferrimagnetic orders are retained in them, but the Curie temperature of the alloys with Nd and Er decreases by 100 and 200 K, respectively. The spontaneous magnetization of the irradiated alloys at 5 K is approximately equal to their magnetization in the crystalline state, whereas their coercive force is lower than that for the alloys before irradiation by two orders of magnitude. The effects observed are explained by the dispersion of Fe-Fe exchange interactions resulting from the dispersion of interatomic spacings in the amorphous alloys.
Мозаичные фотоприемники (МФП) сверхвысокой размерности создают посредством технологии
прецизионной микросборки субмодулей меньшего, приемлемого для изготовления формата [1-11].
Мозаичная технология является прорывным решением проблемы кардинального увеличения форматов
фотоприемников. Применение МФП ограничивается размерами "слепых зон" [1-8]. Уменьшение
количества фоточувствительными элементов (ФЧЭ), потерянных в "слепых зонах", повышает
эффективность преобразования изображений, увеличивает объем данных для последующей обработки
и улучшает качество визуализируемых изображений.
Using X-ray, elastic neutron diffraction (END) and small angular neutron scattering (SANS) methods (Diffractometers D2 and D3 respectively), transmitting electronic microscopy (JEOL JEM-200CX) and magnetometry technique (vibrating sample magnetometer -VSM) the structure and magnetic properties of the rapidly quenched (RQ)
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