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

J. Kasiuka, J. Fedotova a, J. Przewoźnik b, C. Kapusta b, V. Skuratov c, I. Svito d, V. Bondariev e and T.N. Kołtunowicz e aInstitute for Nuclear Problems of Belarussian State University, 220030 Minsk, Belarus bAGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Department of Solid State Physics, al. Mickiewicza 30, 30-059 Krakow, Poland cJoint Institute for Nuclear Research, 141980 Dubna, Russia dBelarusian State University, 220030 Minsk, Belarus eDepartment of Electrical Devices and High Voltage Technology, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland

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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.

DOI: 10.12693/APhysPolA.132.206 PACS numbers: 75.50.Tt, 75.30.Gw, 81.15.Jj, 81.40.Wx, 81.40.Rs, 61.80.Jh