Quasi-hexagonal nanopatterned porous cobalt ferrite thin films prepared via block copolymer self-assembly

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abstract

We present a novel method for fabricating dense and nanopatterned porous cobalt ferrite (CoFe2O4) thin films with a remarkable thickness of 65 nm, achieved through direct block copolymer self-assembly. By decomposing the block copolymer and inducing crystallization of the spinel phase, we successfully produce films exhibiting quasi-hexagonal arrays of pores with an average diameter ranging from 60 to 80 nm. The resulting nanopatterned porous thin films demonstrate exceptional orderliness, as the pores are intricately designed by the cobalt ferrite grains, and the platinum substrate offers complete accessibility in the pore area. Our findings reveal high magnetization values, comparable to those of bulk CoFe2O4, in the dense film. Additionally, in the case of the nanopatterned porous film, we observed a distinctive contribution of perpendicular magnetization. This innovative approach holds great promise for advanced magnetization and thin-film engineering applications.

keywords

NANOSTRUCTURES; LITHOGRAPHY; FABRICATION

subject category

Science & Technology - Other Topics; Materials Science

authors

Castro, A; Ferreira, LP; Godinho, M; Rodriguez, BJ; Vilarinho, PM; Ferreira, P

our authors

foto Paula Celeste da Silva Ferreira

Paula Celeste da Silva Ferreira

Coordinating Researcher
foto Paula Maria Lousada Silveirinha Vilarinho

Paula Maria Lousada Silveirinha Vilarinho

Vice Director

Groups

G2 - Photonic, Electronic and Magnetic Materials

Projects

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)

Projeto de Investigação Exploratória: Paula Ferreira (IF_Paula Ferreira)

acknowledgements

FCT-Fundacao para a Ciencia e a Tecnologia, Grant/Award Numbers: UIDB/50011/2020, UIDP/50011/2020, LA/P/0006/2020, UIDB/04046/2020, UIDP/04046/2020, SFRH/BD/67121/2009, IF/00300/2015; Science Foundation Ireland, Grant/Award Number: 16/IA/4584

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Publication Details

type
Journal Article
year
2024
journal
NANO SELECT
volume
5
publisher
WILEY
isbn
2688-4011
issue
7-8
digital object identifier
10.1002/nano.202300113
link
gold
web of science article identifier
WOS:001186495400001

Citations

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