This article is cited in 6 papers

Surface physics, thin films

Ni–Ge nanostructures: Role of the interface and the magnetic properties

Yu. È. Greben'kova^a, A. V. Chernichenko^a, D. A. Velikanov^ab, I. А. Turpanov^a, E. H. Mukhamedzhanov^c, Ya. V. Zubavichus^c, A. K. Cherkov^d, G. S. Patrin<sup>ab

a</sup> L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk
^b Siberian Federal University, Krasnoyarsk
^c National Research Centre "Kurchatov Institute", Moscow
^d Boreskov Institute of Catalysis SB RAS, Novosibirsk

Abstract: The surface morphology and local structure of layers in the Ni–Ge and Ge–Ni–Ge–Ni–Ge films have been investigated. It has been shown that the surface of the films follows the roughnesses of the substrate surface, which have characteristic dimensions of 2–4 nm in height and $\sim$100 nm in plane. It has been found that an interface with the depth ranging from 9 to 18 nm is formed at the boundaries between the Ni and Ge layers. The data obtained have been used to explain the specific features of the magnetic properties of the studied films, such as the asymmetry of hysteresis loops at low temperatures and the difference between the temperature dependences of the magnetization of the samples for two cooling modes: in a magnetic field and without a magnetic field.

Received: 29.09.2011
Accepted: 18.11.2011

 English version: Physics of the Solid State, 2012, 54:7, 1494–1500

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