Modification of the structure and magnetic properties of Gd films doped with Co

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The article presents experimental data on the structure and magnetic properties of films of the Gd–Co system with a low Co content (up to 20 at%) obtained by magnetron sputtering. It was found that the films of pure Gd differ in structural heterogeneity, expressed in the presence of crystalline hcp and fcc phases and presumably an X-ray amorphous phase with a large dispersion in the size of nanocrystallites. The ferromagnetism of the crystalline state and the metabolic frustration of the nanocrystalline phase ensure the asperomagnetic state of the films. Amorphization, which increases with an increase in the Co content, leads to the formation of a more homogeneous distribution of Gd atoms in the medium and provides a gradual transition to a ferromagnetic state, but with a reduced Curie temperature.

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Sobre autores

A. Nizaev

Ural Federal University named after the First President of Russia B. N. Yeltsin

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002

E. Kudyukov

Ural Federal University named after the First President of Russia B. N. Yeltsin

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002

A. Gorkovenko

Ural Federal University named after the First President of Russia B. N. Yeltsin

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002

M. Semkin

Ural Federal University named after the First President of Russia B. N. Yeltsin; Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002; Ekaterinburg, 620108

E. Kravtsov

Ural Federal University named after the First President of Russia B. N. Yeltsin; Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002; Ekaterinburg, 620108

V. Lepalovskiy

Ural Federal University named after the First President of Russia B. N. Yeltsin

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002

A. Svalov

Ural Federal University named after the First President of Russia B. N. Yeltsin

Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002

V. Vaskovskiy

Ural Federal University named after the First President of Russia B. N. Yeltsin; Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Autor responsável pela correspondência
Email: vladimir.vaskovskiy@urfu.ru
Rússia, Ekaterinburg, 620002; Ekaterinburg, 620108

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2. Fig. 1. Diffractograms of Gd100-xCox films.

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3. Fig. 2. Magnetic properties of Gd film: (a) temperature dependences of magnetisation (curve 1) and inverse paramagnetic susceptibility (curve 2); (b) hysteresis loop measured at 5 K temperature.

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4. Fig. 3. Temperature dependences of magnetisation (a) measured in a magnetic field of 100 Å strength and magnetisation curves (b) measured at 5 K for Gd-Co films of different compositions.

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5. Fig. 4. Temperature dependences of high-field susceptibility of Gd100-xCox films of different compositions.

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6. Fig. 5. Temperature dependences of the coercivity of Gd100-xCox films.

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