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1

Effect of High Energy Ion Implantation on the Structure and Mechanical Properties of Aluminium Alloys

100%

Anishchik V., Poliak N., Ponaryadov V., Opielak M., Boiko O.

Acta Physica Polonica A

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2017

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vol. 132

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issue 2

291-294

EN

The effect of implantation of Ne⁺, Kr⁺, and Bi⁺ ions over the energy range 26-710 MeV on the structural-phase state and the mechanical properties of the aluminum-based alloys (Al-Cu, Al-Cu-Mg, Al-Cu-Zn, Al-Mn) was studied. The revealed peculiarities of variations in the structure, phase composition, and mechanical properties of aluminum alloys are attributed to the electron deceleration of ions making the principal contribution to the formation of radiation defects which enhance the diffusion processes in the targets.

2

Defect Range and Evolution in Swift Xe-Ion Irradiated Pure Silver Studied by Positron Annihilation Technique

76%

Dryzek J., Horodek P., Skuratov V.

Acta Physica Polonica A

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2017

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vol. 132

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issue 5

1585-1589

EN

Variable energy positron beam and positron lifetime spectroscopy were used to study pure silver samples exposed to irradiation with swift Xe²⁶⁺ ions of energy 167 MeV with different dose: of 10¹³, 5×10¹³ and 10¹⁴ ions/cm². The positron lifetime spectroscopy revealed the presence of dislocations or vacancies associated with dislocations. They are distributed at the depth of about 6 μm, and this correlates with the ion implantation range, i.e. 9 μm. However, some defects are observed also to a depth of about 18 μm. At the depth less than 1 μm from the entrance surface strong dependence of positron diffusion length on the dose is observed. It indicates the presence of interstitial atoms and/or dislocation loops as a result of Xe²⁶⁺ ions implantation.

3

Magnetotransport in Si ⟨Sb⟩ Delta-Layer after Swift Heavy Ion-Induced Modification

64%

Fedotov A., Skuratov V., Yurasov D., Novikov A., Svito I., Apel P., Fedotov A., Zukowski P., Fedotova V.

Acta Physica Polonica A

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2017

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vol. 132

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issue 2

229-232

EN

In the present paper the investigations of the influence of swift heavy ion irradiation on the magnetotransport in the antimony (Sb) δ-layer in silicon are reported. Temperature and magnetic field dependences of the resistance R(T,B) and the Hall coefficient R_H(T,B) in the temperature range of 2K < T < 300K and B ≤ 8T before and after the 167 MeV Xe⁺²⁶ ion irradiation (ion fluence of 10⁸ cm¯²) were measured. At the temperatures below 50K there is observed the transition from the Arrhenius log R(1/T) to a logarithmic R ≈ -log(T) dependence both before and after the swift heavy ion exposure which confirms the assumption that the carrier transport goes through the δ-layer mainly. Moreover, the transition from the positive to negative magnetoresistance was observed with the temperature decrease that is characteristic of the two-dimensional quantum corrections to the conductivity in the case of weak localization regime. The appropriate Thouless lengths L_{Th}(T) ≈ A × T^{p} (where p and A are dependent on the scattering mechanism) indicated their ≈ 25-30% decrease after the swift heavy ion exposure. It was shown that the exponent p values were close to the theoretical one of p = 1, confirming the realization of 2D weak localization regime in the carrier transport.

4

Ion Irradiation of Oxidized FeCoZr-CaF₂ Nanocomposite Films for Perpendicular Magnetic Anisotropy Enhancement

52%

Kasiuk J., Fedotova J., Przewoźnik J., Kapusta C., Skuratov V., Svito I., Bondariev V., Kołtunowicz T.

Acta Physica Polonica A

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2017

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vol. 132

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issue 2

206-209

EN

The paper is focused on the results of Xe ions irradiation of nanocomposite FeCoZr-CaF₂ films synthesized in the oxygen-containing atmosphere. Combined influence of nanoparticles partial oxidation and ion irradiation with different fluences on the crystalline structure, phase composition and magnetic anisotropy is analysed by X-ray diffraction, the Mössbauer spectroscopy and vibrating sample magnetometry. The origin of the detected progressive enhancement of perpendicular magnetic anisotropy as the result of films oxidation and irradiation is discussed in the context of formation of nanoparticles oxide shells and ion tracks along the films normal.

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4 Acta Physica Polonica A

4 2017

3 Skuratov V.

2 Svito I.

1 Anishchik V.

1 Apel P.

1 Boiko O.

1 Bondariev V.

1 Dryzek J.

1 Fedotov A.

1 Fedotova J.

1 Fedotova V.

1 Horodek P.

1 Kapusta C.

1 Kasiuk J.

1 Kołtunowicz T.

1 Novikov A.

1 Opielak M.

1 Poliak N.

1 Ponaryadov V.

1 Przewoźnik J.

1 Yurasov D.

1 Zukowski P.

Effect of High Energy Ion Implantation on the Structure and Mechanical Properties of Aluminium Alloys

Defect Range and Evolution in Swift Xe-Ion Irradiated Pure Silver Studied by Positron Annihilation Technique

Magnetotransport in Si ⟨Sb⟩ Delta-Layer after Swift Heavy Ion-Induced Modification

Ion Irradiation of Oxidized FeCoZr-CaF₂ Nanocomposite Films for Perpendicular Magnetic Anisotropy Enhancement