Characterization of Aggregate State of Polydisperse Ferrofluids: Some Aspects of Anisotropy Analysis of 2D SAXS in Magnetic Field
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Journal of Magnetism and Magnetic Materials
ISSN: 0304-8853
|
| Вых. Данные |
Год: 2018,
Том: 459,
Страницы: 285-289
Страниц
: 5
DOI:
10.1016/j.jmmm.2017.10.052
|
| Ключевые слова |
FerrofluidsMagnetic fluidsSmall-angle scatteringDipole-dipole interactionDipolar fluidsAggregation |
| Авторы |
Veligzhanin A.A.
1
,
Frey D.I.
2
,
Shulenina A.V.
3,1
,
Gruzinov A.Yu.
4
,
Zubavichus Ya.V.
1
,
Avdeev M.V.
5,3
|
| Организации |
| 1 |
National Research Centre ‘Kurchatov Institute’
|
| 2 |
Shirshov Institute of Oceanology RAS, Moscow, Russia
|
| 3 |
Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
|
| 4 |
EMBL, Hamburg c/o DESY, Hamburg, Germany
|
| 5 |
Joint Institute for Nuclear Research, Dubna, Moscow Reg., Russia
|
|
2D small-angle X-ray scattering (SAXS) patterns for dilute ferrofluids with different degree of particle interaction under external magnetic field are analyzed to obtain structural characteristics of aggregates formed by polydisperse particles. Classical ferrofluids based on organic low-polarity solvents (toluene, decalin) with dispersed nanoparticles of magnetite and cobalt coated with oleic acid and water-based ferrofluid with dispersed magnetite nanoparticles coated with double layer of sodium oleate, are studied. All systems show the Langevin type behavior regarding the orientation of the anisotropic aggregates in them with the saturation at a relatively weak magnetic field strength. The field-induced anisotropy in the SAXS patterns is considered in the frame of a simple approximation.