Magnetoimpedance Effect in CoFeMoSiB As-Quenched and Surface Modified Amorphous Ribbons in the Presence of Igon Oxide Nanoparticles of Water-Based Ferrofluid / Lotfollahi Zahra,Amirabadizadeh Ahmad,Safronov Aleksander P.,Beketov Igor V.,Kurlyandskaya Galina V. // JOURNAL OF SENSORS. - 2017. - V. , l. .

ISSN/EISSN:

1687-725X / 1687-7268

Type:

Article

Abstract:

Giant magnetoimpedance (GMI) has been proposed as a powerful technique for biosensing. In GMI biosensors based on the magnetic label detection the change of the impedance of sensitive element under the application of an external magnetic field was analyzed in the presence ofmagnetic nanoparticles in a test solution. Amorphous ribbon-based GMIbiodetectors have an advantage of low operation frequency and low cost. In this work, magnetic and GMI properties of amorphous Co68.6Fe3.9Mo3.0Si12.0B12.5 ribbons were studied in as-quenched and surface modified states both without and in the presence of maghemite ferrofluid. After the surface modification the coercivity was slightly increased and saturation magnetization decreased in good agreement with increase of the surface roughness, a decrease of magnetic elements concentrations in the surface layer, and formation of a surface protective oxide layer. The GMI difference for as-quenched ribbons in absence and in the presence of ferrofluid wasmeasurable for the frequency range of 2 to 10MHz and the current intensities of 1 to 20 mA. Although the proposed surface modification by the ultrasound treatment did not improve the sensitivity limit for ferrofluid detection, it did not decrease it either.

Author keywords:

MAGNETIC-PROPERTIES; NANOPOWDERS; IMPEDANCE

DOI:

10.1155/2017/4365682

Web of Science ID:

ISI:000414098500001

Соавторы в МНС:

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Другие поля

Поле	Значение
Publisher	HINDAWI LTD
Address	ADAM HOUSE, 3RD FLR, 1 FITZROY SQ, LONDON, W1T 5HF, ENGLAND
Language	English
Article-Number	4365682
EISSN	1687-7268
Keywords-Plus	MAGNETIC-PROPERTIES; NANOPOWDERS; IMPEDANCE
Research-Areas	Engineering; Instruments \& Instrumentation
Web-of-Science-Categories	Engineering, Electrical \& Electronic; Instruments \& Instrumentation
Author-Email	galina@we.lc.ehu.es
ORCID-Numbers	lotfollahi, zahra/0000-0002-7419-2004 Kurlyandskaya, Galina/0000-0002-3712-1637
Funding-Acknowledgement	ELKARTEK of the Basque Country Government {[}KK-2016/00030]; state task of the Ministry of Education and Science of Russia {[}3.6121.2017/8.9]
Funding-Text	This work was financially supported by the ELKARTEK Grant KK-2016/00030 of the Basque Country Government and the state task of the Ministry of Education and Science of Russia 3.6121.2017/8.9 grants. Some measurements were made at SGIKER UPV-EHU and URFU services. The authors thank A. Larranaga, O. M. Samatov, and A.I. Medvedev for special support.
Number-of-Cited-References	28
Journal-ISO	J. Sens.
Doc-Delivery-Number	FL3CB