Study of Nanostructured Array of Antidots Using Pulsed Magnetic Fields

• Type: Article in International Scientific Journal
• Date: 2010

Authors

leitao, d. c. (Author) Other; ventura, j. (Author) FCUP; pereira, a. m. (Author) FCUP; sousa, c. t. (Author) Other; moreira, j. m. (Author) Other; carpinteiro, f. c. (Author) Other; sousa, j. b. (Author) FCUP; vazquez, m. (Author) Other; araujo, j. p. (Author) FCUP

Journal

Title: Journal of Low Temperature Physics

Vol. 159

Pages: 245-248

ISSN: 0022-2291

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-003-7XM

DOI: 10.1007/s10909-009-0098-2

Abstract (EN): The absence of the superparamagnetic limit in nanostructured antidots makes them strong candidates for ultra-high density recording media. In this work, nanoporous alumina templates (NpATs), with average pore diameters similar to 35 nm and separation similar to 100 nm, were grown using a two-step anodization method. A Ni(80)Fe(20) thin film of 6.5 nm was then sputtered on top of such NpATs, building an antidot network. A detailed study of the magnetoresistance (MR) (fields up to 25 T and temperatures down to 77 K) was performed. The antidot network sample revealed an anomalous MR and R(T) behaviour at T (M) similar to 250 K arising from a spin-flip transition occurring in a thin iron oxide layer.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4