Search for high temperature memory effects in magnetic nanoparticles
| Autor: | Oldrich Schneeweiss, Marko Bošković, N. Pizúrová, Jovan Blanusa, M. Perovic, Vojislav Spasojević, Vladan Kusigerski, Zvonko Jagličić |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Spin glass Magnetometer Nanoparticle Thermal memory cell Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound Dynamic light scattering Magnetite law Magnetic properties Materials Chemistry Super spin glass nanoparticles Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Magnetic memory effect 0104 chemical sciences SQUID chemistry Mechanics of Materials Magnetic nanoparticles Particle 0210 nano-technology Iron oxide nanoparticles |
| Zdroj: | Journal of Alloys and Compounds |
| Popis: | Nanoparticle materials have become a promising candidate for a new kind of storage media based on thermally induced memory effects due to the possibility to tailor their magnetic properties and behaviour. In this study, we have investigated whether the magnetic memory effects could appear at high, industry accessible temperatures including the possibility of thermal data inscription. Investigated iron oxide nanoparticles were synthesized by poliol method, which has been modified in order to allow control of particle agglomeration and consequently magnetic properties. Structure, morphology and the degree of nanoparticle agglomeration were studied by X-Ray diffraction, Transmission Electron Microscopy and Dynamic Light Scattering techniques, while magnetic properties as well as memory effects were measured on a commercial SQUID-based magnetometer. Results of the study confirmed that in super spin glass magnetite nanoparticles, magnetic memory effects can be observed up to 200 K which represents much higher temperatures in comparison to those achieved in spin glasses and other glassy materials. Procedures of writing and reading (inscribing and retrieving) of digital information in such a material were demonstrated and discussed in details. |
| Databáze: | OpenAIRE |
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