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https://elib.bsu.by/handle/123456789/233937| Title: | Использование слабого магнитного поля в мессбауэровских исследованиях сплава 5БДСР, модифицированного мощным ионным пучком |
| Other Titles: | Use of a Weak Magnetic Field in Mössbauer Studies of the 5NbCuSiB Alloy Modified by Intense Ion Beam / R.A. Nazipov, R.I. Batalov, R.M. Bayazitov, H.A. Novikov, V.A. Shustov, E.N. Dulov |
| Authors: | Назипов, Р. А. Баталов, Р. И. Баязитов, Р. М. Новиков, Г. А. Шустов, В. А. Дулов, Е. Н. |
| Keywords: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
| Issue Date: | 2019 |
| Publisher: | Минск : БГУ |
| Citation: | Взаимодействие излучений с твердым телом = Interaction of Radiation with Solids : материалы 13-й Междунар. конф., Минск, Беларусь, 30 сент. – 3 окт. 2019 г. / редкол.: В. В. Углов (отв. ред.) [и др.]. – Минск : БГУ, 2019. – С. 284-287. |
| Abstract: | Проведены мессбауэровские исследования фольги аморфного сплава 5БДСР, модифицированной мощным ионным пучком длительностью около 100 наносекунд с различным количеством импульсов. С целью разделения влияния на форму мессбауэровских спектров, которое оказывают изменение микроструктуры и магнитной текстуры, при мессбауэровских измерениях было использовано наложенное на образцы внешнее магнитное поле напряженностью около 2400 Э. Это позволило получить спектры с одинаковой магнитной текстурой и полагать, что изменение формы распределений сверхтонких магнитных полей связано с изменением микроструктуры сплава в результате облучения. |
| Abstract (in another language): | Mössbauer studies of a foil of an amorphous 5NbCuSiB alloy modified by a intense ion beam with a duration of about 100 nanoseconds with different numbers of pulses were carried out. In order to separate the influence on the shape of the Mössbauer spectra, which have from a change in the microstructure and magnetic texture, in Mössbauer measurements an external magnetic field of about 2400 Oe superimposed on the samples was used. This made it possible to obtain spectra with the same magnetic texture and to assume that the change in the shape of the distributions of the hyperfine magnetic fields is associated with the change in the microstructure of the alloy as a result of irradiation. The distribution of hyperfine fields P(Hhf ), reconstructed from the Mössbauer spectrum of the initial alloy, has the form of a bimodal distribution, with a large maximum in the region of hyperfine fields of about 120-320 kOe and with a small maximum, in the region of 90-140 kOe, the whose shape changes as a result of irradiation. For samples measured in a magnetic field, a small peak on the distribution of P(Hhf ) in the region of smaller fields shows a relative increase in height and its sharpness tends to increase with increasing number of pulses. Consequently, under the assumption that the shock wave generated by the intense ion beam effect can diminish nanopores, similar as hydrostatic compression, such behavior can be associated only with an increase in the quantity of zones depleted in iron and simultaneously with the occupation of atoms in more ordered positions in these zones. The magnitude of the average hyperfine magnetic field <Hhf > for the Mössbauer spectra obtained from measurements in a magnetic field does not change within the limits of the measurement error. On the contrary, for the Mössbauer spectra measured without a field, the value of <Hhf > increases with an increase in the number of pulses, which is associated with a change in the relative intensity of the Mössbauer lines, but rather than structural changes. |
| Description: | Секция 3. Модификация свойств материалов = Section 3. Modification of Material Properties |
| URI: | http://elib.bsu.by/handle/123456789/233937 |
| ISSN: | 2663-9939 |
| Sponsorship: | Исследования выполнены при финансовой поддержке РФФИ в рамках проекта № 19-03-00847. |
| Appears in Collections: | 2019. Взаимодействие излучений с твердым телом = Interaction of Radiation with Solids |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 284-287.pdf | 535,94 kB | Adobe PDF | View/Open |
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