Low Temperature Physics: 39, 66 (2013); https://doi.org/10.1063/1.4776232 (10 pages)
Fizika Nizkikh Temperatur: Volume 39, Number 1 (January 2013), p. 86-97    ( to contents , go back )

Ferromagnetic nanocomposites as spintronic materials with controlled magnetic structure

G.V. Lashkarev1, M.V. Radchenko1, M.E. Bugaiova1, W. Knoff2, T. Story2, Y.A. Stelmakh3, L.A. Krushynskaya3, A.I. Dmitriev1, V.I. Lazorenko1

V.I. Sichkovskyi1

1I. Frantsevich Institute for Problems of Material Science, National Academy of Sciences, 3 Krzhyzhanovsky Str., Kiev 03680, Ukraine
E-mail: gvl35@ipms.kiev.ua

2Institute of Physics, Polish Academy of Sciences, 32/46 Al. Lotników, 02-668 Warsaw, Poland

3Институт электросварки им. Е.О. Патона НАН Украины, ул. Антоновича, 68, г. Киев, Украина
pos Анотація:

Received Septemder 13, 2012

Abstract

The physical properties of ferromagnetic dilute magnetic semiconductors and nanocomposites are considered. The latter have several advantages as spintronic materials with a controlled magnetic structure for weak magnetic field sensors. A characteristic feature of ferromagnetic nanocomposites is the spindependent tunneling conductance, which is responsible for negative and positive magnetoresistance. The magnetoresistive effects have a wide range of applications. In particular, materials with such effects may be used in the development of magnetoresistive memory devices, weak magnetic field sensors, medical diagnostic devices and other items of electronic equipment.

PACS: 72.20.Pа Thermoelectric and thermomagnetic effects;
PACS: 72.80.Tm Composite materials;
PACS: 73.90.+f Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures.

Key words: ferromagnetic nanocomposites, ferromagnetic nanoparticles, the percolation threshold, spindependent tunneling, giant magnetoresistance effect.

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