Effects of Thermal Annealing and Ni Addition on the Magnetic Properties of Co–CoO Multilayers
| Autor: | E. Th. Papaioannou, Panagiotis Poulopoulos, N. Kanistras, Dimitrios I. Anyfantis, Alexandros Barnasas, A. Conca, Constantin Politis, D. Trachylis |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ferromagnetic resonance Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Nickel Chemical engineering chemistry Sputtering 0103 physical sciences Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Cobalt |
| Zdroj: | SPIN. 10 |
| ISSN: | 2010-3255 2010-3247 |
| Popis: | The influence of mild thermal annealing and nickel addition on the magnetic properties of Co–CoO multilayers is investigated. Co–CoO and CoNi–CoNiO multilayers were fabricated by radio-frequency magnetron sputtering and natural oxidation. Their magnetic properties have been studied via the magneto-optical Kerr effect and a vector network analyzer ferromagnetic resonance setup. The Co–CoO multilayers were annealed up to 90[Formula: see text]min at [Formula: see text]C and they were found to be always in-plane magnetized. The value of Gilbert damping was evaluated. The multilayers after annealing or Ni addition show a small increase in coercivity without considerable changes in their anisotropy. The phenomenon of inverted hysteresis with negative remanence, with the field being applied perpendicular to the film plane, has been recorded. It was modeled with two coexisting magnetic moments with in-plane and perpendicular anisotropies, respectively. |
| Databáze: | OpenAIRE |
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