Low Temperature Physics: 31, 358 (2005); https://doi.org/10.1063/1.1886925 (6 pages)
Fizika Nizkikh Temperatur: Volume 31, Number 3-4 (March 2005), p. 471-478    ( to contents , go back )

Magnetic resonance and oscillations of magnetic anisotropy in superlattices Co/Cu(111)

A.I. Kaplienko, E.P. Nikolova, K.V. Kut`ko

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine

A.G. Anders

V.N. Karazin Kharkov National University, pl. Svobodi 4, Kharkov 61077, Ukraine
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: aanders@ilt.kharkov.ua

V.V. Zorchenko, and A.N. Stetsenko

National Technical University "Kharkov Polytechnical institute", Frunze st. 21, 61002 Kharkov, Ukraine
E-mail: zorch@kpi.kharkov.ua
pos Анотація:

Received Jule 28, 2004, revised September 28, 2004

Abstract

Magnetic resonance in the multilayer magnetron sputtered system [Co(8 Å)/Cu(dCu(111)]20 have been investigated at external magnetic field normal or parallel to the film plane. It is found that magnetic anisotropy KA and resonance line width DHres are oscillated with varying copper layer thickness dCu from 7 to 19 Å. Extremal values of KA and DHres were observed at dCu= nd(111) where n is integer or half-integer and d(111) = 2,087 Å is the distance between the Cu (111) planes. The separation between neighbouring maxima and minima was 1, 1.5 and 2 d(111). The oscillations of KA and DHres are accompanied by synchronous oscillations of specific resistance (for the saturated state in an external magnetic field of 15 kOe) and magnetoresistance. In thickness regions dCu=8–11 Å and dCu ≥ 18 Å the manifestations of interlayer antiferromagnetic exchange interactions were revealed. The observed effects are connected with non-monotonous variations in roughness of the layer interfaces with increasing dCu.

PACS:
75.30.Gw - Magnetic anisotropy
76.50.+g - Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance (see also 75.30.Ds Spin waves)

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