Transition from antiferromagnetic interlayer ordering to superparamagnetic state in Fe/Cr nanostructures by varying Fe thickness / Ustinov V. V.,Milyaev M. A.,Romashev L. N.,Korolev A. V.,Tsurin V. A.,Yartseva N. S.,Yartsev S. V.,Parlebas J. C. // EUROPEAN PHYSICAL JOURNAL B. - 2010. - V. 74, l. 4. - P. 467-474.

ISSN/EISSN:

1434-6028 / нет данных

Type:

Article

Abstract:

Transition from antiferromagnetic exchange coupling of the Fe layers to superparamagnetic state of the Fe/Cr nanostructures is studied experimentally and theoretically. The experimental study are performed by means of magnetoresistance and magnetization measurements as well as Mossbauer spectroscopy for the nanostructures with Fe layers thicknesses from 1.4 up to 16 alternating by 10 of Cr layers. It is shown that Fe layers in the nanostructures with thicknesses less than 2 are not continuous but consist of separate ferromagnetic clusters. Such cluster-layered nanostructures exhibit Langevin paramagnetism of the superparamagnetic clusters and the Kondo-like behavior of the resistance. For the considered nanostructures, a modeling of Fe and Cr atoms random deposition for the interface layers and self-consistent calculations of the magnetic moments distribution in Periodic Anderson model are carried out. It is shown that, for nanostructures with extremely thin Fe layers, the Fe clusters with lateral size in the range of 11 to 20 are self-organized. Calculations of magnetic moments distribution result in histograms which coincide with the hyperfine field distributions obtained by Mossbauer spectroscopy.

Author keywords:

MOSSBAUER-SPECTROSCOPY; MAGNETIC-MOMENTS; MULTILAYERS; INTERFACE; SUPERLATTICES; REDUCTION; SURFACE; LAYERS

DOI:

10.1140/epjb/e2010-00118-2

Web of Science ID:

ISI:000276900000007

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	APR
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Keywords-Plus	MOSSBAUER-SPECTROSCOPY; MAGNETIC-MOMENTS; MULTILAYERS; INTERFACE; SUPERLATTICES; REDUCTION; SURFACE; LAYERS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	Jean-Claude.Parlebas@ipcms.u-strasbg.fr
ResearcherID-Numbers	Alexander, Korolev/K-3036-2013 Ustinov, Vladimir/G-7501-2011 Yartseva, Nadezda/J-3604-2013 Milyaev, Mikhail/J-8070-2013 Romashev, Lazar/J-7644-2013
ORCID-Numbers	Alexander, Korolev/0000-0002-5104-3997 Ustinov, Vladimir/0000-0002-5155-7947 Yartseva, Nadezda/0000-0002-4715-5945 Milyaev, Mikhail/0000-0001-7828-3571 Romashev, Lazar/0000-0002-6051-4543
Funding-Acknowledgement	RFBR {[}07-02-01289, 06-02-16722]; Scientific School of RF {[}869.2006.2]; bilateral exchange program CNRS-RAS
Funding-Text	This work is partially supported by RFBR 07-02-01289, 06-02-16722, Scientific School of RF 869.2006.2 and bilateral exchange program CNRS-RAS. We appreciate Bebenin N. for fruitful scientific discussions.
Number-of-Cited-References	19
Usage-Count-Since-2013	7
Journal-ISO	Eur. Phys. J. B
Doc-Delivery-Number	586IK