High-sensitive hysteresisless spin valve with a composite free layer / Ustinov V. V.,Milyaev M. A.,Naumova L. I.,Proglyado V. V.,Bannikova N. S.,Krinitsina T. P. // PHYSICS OF METALS AND METALLOGRAPHY. - 2012. - V. 113, l. 4. - P. 341-348.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

Method of dc magnetron deposition has been used to prepare metallic nanostructures of the (Si, Al2O3, glass)/Ta/{[}NiFe/CoFe]/Cu/CoFe/(FeMn, MnIr)/Ta spin-valve type with a composite ``free layer{''} Ni80Fe20/Co90Fe10. A three-stage method of decreasing hysteresis of the free layer has been suggested. The dependence of the magnitude of the giant magnetoresistance and hysteresis has been investigated depending on the angle between the direction of the easy magnetization axis of the free layer and the direction of the applied magnetic field in the plane of layers. It is shown that in the spin valves studied the hysteresis can be reduced to a few tenths of an oersted at the magnitude of the magnetoresistance more than 8\%. In the case of a spin valve with an antiferromagnet Fe50Mn50 the magnetoresistive sensitivity in the range of the hysteresisless variation of the magnetoresistance was equal to 1\%/Oe, whereas the maximum sensitivity in the presence of a hysteresis exceeded 6\%/Oe. A greater sensitivity (2.5\%/Oe) at the magnitude of the free-layer hysteresis of 0.6 Oe was obtained for spin valves on the basis of the antiferromagnetic Mn75Ir25 alloy. For them, the maximum magnetoresistance was equal to 11.6\%.

Author keywords:

spin valve; multilayer nanostructures; giant magnetoresistance; magnetron deposition; small hysteresis of the free layer; Fe50Mn50; Mn75Ir25 GIANT MAGNETORESISTANCE; MULTILAYERS; COERCIVITY

DOI:

10.1134/S0031918X12040151

Web of Science ID:

ISI:000302807400004

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	APR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	GIANT MAGNETORESISTANCE; MULTILAYERS; COERCIVITY
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	Ustinov, Vladimir/G-7501-2011 Milyaev, Mikhail/J-8070-2013 Krinitsina, Tatiana/I-6600-2013 Bannikova, Nataly/J-5273-2013 Proglyado, Vyacheslav/K-7725-2013 Naumova, Larisa/K-3028-2013
ORCID-Numbers	Ustinov, Vladimir/0000-0002-5155-7947 Milyaev, Mikhail/0000-0001-7828-3571 Krinitsina, Tatiana/0000-0003-1029-0737 Bannikova, Nataly/0000-0002-8716-5128 Proglyado, Vyacheslav/0000-0003-3760-8696 Naumova, Larisa/0000-0001-5463-6790
Funding-Acknowledgement	Presidium of the Ural Branch, Russian Academy of Sciences {[}09-P-2-1037]; Russian Foundation for Basic Research {[}10-02-00590]; Foundation for Oriented Basic Research, Ural Branch, Russian Academy of Sciences {[}11-2-23-NPO]
Funding-Text	This work was performed according to the theme ``Spin,{''} and was supported in part by the Presidium of the Ural Branch, Russian Academy of Sciences (project no. 09-P-2-1037), by the Russian Foundation for Basic Research (project no. 10-02-00590), and by the Foundation for Oriented Basic Research, Ural Branch, Russian Academy of Sciences (project no. 11-2-23-NPO).
Number-of-Cited-References	26
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	11
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	926BX