Publication: Anisotropy of Assemblies of Densely Packed Co-Alloy Nanoparticles Embedded in Carbon Nanotubes
Дата
2019
Авторы
Prischepa, S. L.
Danilyuk, A. L.
Kukharev, A. V.
Cojocaru, C. S.
Kargin, N. I.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
IEEEWe report on the magnetic properties of an array of binary metal CoFe, CoNi and CoPt nanoparticles (NPs) embedded inside vertically-oriented carbon nanotubes (CNTs). Samples were synthesized by chemical vapor deposition activated by current discharge plasma and hot filaments. Assemblies of Co-based catalytic NPs have been preliminary formed on SiO2/Si substrates by sputtering of ultrathin films followed by reduction in a H2/NH3 mixture. As a result of the CNT growth, each CNT contained only one ferromagnet top-located NP. For all samples the easy axis of magnetization was oriented along the CNT axis. Using the obtained experimental data and the random anisotropy model, the magnetic parameters like the effective anisotropy constant, the contribution of dipole interaction, shape, magnetocrystalline and magnetoelastic anisotropy were estimated. It is shown that the latter contribution of anisotropy is decisive. From the obtained magnetoelasticity the stresses in NPs embedded inside CNTs were determined. Finally, the magnetization distribution in CoFe, CoNi and CoPt NPs was simulated considering the magnetoelastic contribution.
Описание
Ключевые слова
Цитирование
Anisotropy of Assemblies of Densely Packed Co-Alloy Nanoparticles Embedded in Carbon Nanotubes / Prischepa, S.L. [et al.] // IEEE Magnetics Letters. - 2019. - 10.1109/LMAG.2019.2933380
URI
https://www.doi.org/10.1109/LMAG.2019.2933380
https://www.scopus.com/record/display.uri?eid=2-s2.0-85078692707&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000482586700001
https://openrepository.mephi.ru/handle/123456789/18560
https://www.scopus.com/record/display.uri?eid=2-s2.0-85078692707&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000482586700001
https://openrepository.mephi.ru/handle/123456789/18560