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Eng. Andrei ALEXANDRU-DINU

Assistant Researcher

Laboratory of Magnetism and Superconductivity

andrei[DOT]alexandrudinu[AT]infim[DOT]ro
Keywords: Data Analysis, Fluorescence Spectroscopy, Magnetic

Education

2010-2014 : National College Spiru Haret, Ploiesti (Romania)

2014-2018 : Bachelor's Degree - Politehnica University  of Bucharest, Faculty of Applied Sciences, Physics Engineering, Bucuresti (Romania)

2018-2020 : Master Degree - Politehnica University  of Bucharest, Faculty of Applied Sciences, Engineering and Applications of Lasers and Accelerators, Bucuresti (Romania)

2020-present : PhD - University of Bucharest, Faculty of Physics, Condensed Matter and Materials Physics, Magurele (Romania)

Positions

2018-present : Assistant Researcher - National Institute of Materials Physics, Laboratory of Magnetism and Superconductivity, Magurele (Romania)

Research interests

My research interests are in the area of magnetic materials, in particular, the design and the morpho-structural characterization of iron oxides and the analysis of their magnetic properties by magnetometers and Mossbauer Spectroscopy. I am also interested in intermetallics alloys, synthesized by non-equilibrium techniques such as Spark Plasma Sintering, Melt Spinning and Optical Floating Zone. My research in this area mainly contributes to the literature on magnetic materials characterization but also to the fundamental approach on this kind of systems.

Expertize

X-Ray Fluorescence, Magnetic Materials, Materials Science, Materials Engineering, Magnetic Measurements, Melt Spinning, Intermetallic Alloys, Oxides

Resume

In the present studies, I'm focused on three types of compounds: 1) Iron intermetallics with and without rare earth elements (Ex: GdFeB, FeSiB). As an example, in the last years, amorphous intermetallics containing rare earth elements and transition metals, scientists discovered they have different characteristics depending on the ionic anisotropy of the rare earth element.

                                                                                                                      2) Aluminosilicates presenting clusterization processes and rare earth based oxides (Ex: Ancient Roman ceramics or composites, RIG - rare earth iron garnets). As an example, a complex archaeometric characterization combined with materials characterization techniques (XRD, XRF, SEM, Mossbauer Spectroscopy and others) on a foreign material (Roman brick - 2nd to 3rd century AD), had led to the understanding of the historical theories but also of the ancient materials and how this affected the society.

                                                                                                                      3) Nanocomposites (borides or carbides containing transition metals or rare earths). The research is focused on the investigation of the local properties of the nanostructures and nanocomposites of different borides/carbides systems (Ex: High magnetic order temperature). 

In resume, my research is based on different classes of materials containing rare earth elements or transition metals which allows the getting of multi-functional properties. In particular, the focus is set on the local nanometric level of effects and events followed by the extrapolation to the macro-scales needed for the practical applications.

Publications

1. Microstructure and coupling mechanisms in MnBi-FeSiB nanocomposites obtained by spark plasma sintering
Authors: Alexandru-Dinu, A; Locovei, C; Bartha, C; Grigoroscuta, MA; Burdusel, M; Kuncser, A; Palade, P; Schinteie, G; Iacob, N; Lu, W; Batalu, D; Badica, P; Kuncser, V

Published: JUL 24 2024, SCIENTIFIC REPORTS, 14, 17029, DOI: 10.1038/s41598-024-67353-7

2. Two Roman Glass Furnaces Discovered at Resca-Romula (Romania)
Authors: Negru, M; Badica, P; Alexandru-Dinu, A; Galatanu, M; Kuncser, A; Patroi, D; Artene, I

Published: OCT 1 2023, AMERICAN JOURNAL OF ARCHAEOLOGY, 127, DOI: 10.1086/726009

3. Influence of erbium doping on the structural, magnetic and optical properties of hematite (?-Fe(2)O( )3) nanorods
Authors: Popov, N; Ristic, M; Kuncser, V; Zadro, K; Velinov, N; Badica, P; Alexandru-Dinu, A; Iacob, N; Krehula, LK; Music, S; Krehula, S

Published: OCT 2022, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 169, 110857, DOI: 10.1016/j.jpcs.2022.110857

4. Kaolin clay pottery discovered in the Roman city of Romula (Olt County, Romania)
Authors: Badica, P; Alexandru-Dinu, A; Grigoroscuta, M; Locovei, C; Kuncser, A; Bartha, C; Aldica, G; Negru, M; Batalu, D; Cruceru, N; Savulescu, I

Published: APR 2021, JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS, 36, DOI: 10.1016/j.jasrep.2021.102899

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