Study on the structural and magnetic properties of e-beam evaporated Co thin films annealed in vacuum
Само за регистроване кориснике
2023
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The present paper investigates the effects of thermal annealing on the structural and magnetic properties of Co thin films. The films were prepared by using electron-beam evaporation method onto Si (100) wafers and annealed in vacuum at 200 °C, 300 °C and 400 °C. A combination of X-ray diffraction, Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, transmission electron microscopy and energy-dispersive X-ray spectrometry were used to characterize structural properties and the composition of the films, while magnetic behavior was studied by magneto-optical Kerr effect measurements. It was found that as deposited Co layer show predominantly uniaxial magnetic anisotropy, while after annealing at 200 °C and 300 °C a strong influence of fourfold contribution is observed, which is assigned to the thermally induced HCP→FCC phase transition. With further increase in annealing temperature of 400 °C the isotropic contribution becomes the main component of magnetization. Be...sides, a strong variation in coercive field with annealing temperature was observed, where the coercivity seems to depend closely on the crystallite size. The highest value of HC equals ∼70 Oe and was found for the temperature of 400 °C, where also mixing at the interface has started and formation of CoSi was observed.
Кључне речи:
Cobalt thin films / Coercivity / Microstructure / MOKE / Thermal annealing / VacuumИзвор:
Journal of Alloys and Compounds, 2023, 937, 168411-Финансирање / пројекти:
- COST Action [CA19140]
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200017 (Универзитет у Београду, Институт за нуклеарне науке Винча, Београд-Винча) (RS-MESTD-inst-2020-200017)
Институција/група
VinčaTY - JOUR AU - Novaković, Mirjana M. AU - Popović, Maja AU - Rajić, Vladimir PY - 2023 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10575 AB - The present paper investigates the effects of thermal annealing on the structural and magnetic properties of Co thin films. The films were prepared by using electron-beam evaporation method onto Si (100) wafers and annealed in vacuum at 200 °C, 300 °C and 400 °C. A combination of X-ray diffraction, Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, transmission electron microscopy and energy-dispersive X-ray spectrometry were used to characterize structural properties and the composition of the films, while magnetic behavior was studied by magneto-optical Kerr effect measurements. It was found that as deposited Co layer show predominantly uniaxial magnetic anisotropy, while after annealing at 200 °C and 300 °C a strong influence of fourfold contribution is observed, which is assigned to the thermally induced HCP→FCC phase transition. With further increase in annealing temperature of 400 °C the isotropic contribution becomes the main component of magnetization. Besides, a strong variation in coercive field with annealing temperature was observed, where the coercivity seems to depend closely on the crystallite size. The highest value of HC equals ∼70 Oe and was found for the temperature of 400 °C, where also mixing at the interface has started and formation of CoSi was observed. T2 - Journal of Alloys and Compounds T1 - Study on the structural and magnetic properties of e-beam evaporated Co thin films annealed in vacuum VL - 937 SP - 168411 DO - 10.1016/j.jallcom.2022.168411 ER -
@article{ author = "Novaković, Mirjana M. and Popović, Maja and Rajić, Vladimir", year = "2023", abstract = "The present paper investigates the effects of thermal annealing on the structural and magnetic properties of Co thin films. The films were prepared by using electron-beam evaporation method onto Si (100) wafers and annealed in vacuum at 200 °C, 300 °C and 400 °C. A combination of X-ray diffraction, Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, transmission electron microscopy and energy-dispersive X-ray spectrometry were used to characterize structural properties and the composition of the films, while magnetic behavior was studied by magneto-optical Kerr effect measurements. It was found that as deposited Co layer show predominantly uniaxial magnetic anisotropy, while after annealing at 200 °C and 300 °C a strong influence of fourfold contribution is observed, which is assigned to the thermally induced HCP→FCC phase transition. With further increase in annealing temperature of 400 °C the isotropic contribution becomes the main component of magnetization. Besides, a strong variation in coercive field with annealing temperature was observed, where the coercivity seems to depend closely on the crystallite size. The highest value of HC equals ∼70 Oe and was found for the temperature of 400 °C, where also mixing at the interface has started and formation of CoSi was observed.", journal = "Journal of Alloys and Compounds", title = "Study on the structural and magnetic properties of e-beam evaporated Co thin films annealed in vacuum", volume = "937", pages = "168411", doi = "10.1016/j.jallcom.2022.168411" }
Novaković, M. M., Popović, M.,& Rajić, V.. (2023). Study on the structural and magnetic properties of e-beam evaporated Co thin films annealed in vacuum. in Journal of Alloys and Compounds, 937, 168411. https://doi.org/10.1016/j.jallcom.2022.168411
Novaković MM, Popović M, Rajić V. Study on the structural and magnetic properties of e-beam evaporated Co thin films annealed in vacuum. in Journal of Alloys and Compounds. 2023;937:168411. doi:10.1016/j.jallcom.2022.168411 .
Novaković, Mirjana M., Popović, Maja, Rajić, Vladimir, "Study on the structural and magnetic properties of e-beam evaporated Co thin films annealed in vacuum" in Journal of Alloys and Compounds, 937 (2023):168411, https://doi.org/10.1016/j.jallcom.2022.168411 . .