Mahieddine Lahoubi was born in Bologhine Ibn Ziri (formerly Saint Eugène) Algiers, Algeria, in 1957. After earning a Master's degree in materials sciences (DEA, Diplôme d'études approfondie) in 1982, he received in 1986 the ‘Doctorat d’État Es-Sciences’ in Physics from ‘Université Joseph Fourier, (UJF)’ of Grenoble, France and from the ‘Institut National Polytechnique, (INP)’ of Grenoble, France. Now, he is a Professor (Full) and Research Director since 1998 at Badji-Mokhtar Annaba University, Algeria. He has offered more than 20 different courses (undergraduate, graduate, and postgraduate) in last year’s. He has more than 20 supervisions and examinations of Magister, Doctorate of State, new Doctoral' thesis, and some Master's degrees of science, during his entire research and teaching academic career. He is the author and/or co-author over 70 peer-reviewed papers in Physics and Materials Science and actively participated in more than 80 international conferences. He has always dedicated to promote scientific research to the development of science of his country through National and International exchanges and cooperations with renowned Institutions in France (UJF, CNRS, Institut Néel, LNCMI-G, ILL,...) in China (College of Science, and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Department of Physics and Electronics, Beijing University of Chemical Technology), in Georgia (Institute of Inorganic Chemistry and Electrochemistry Ivane Javakhishvili Tbilissi State University). He is an Individual Member of the European Rare Earth and Actinide Society, Lausanne, Switzerland, since 1999. He has served as a 'peer reviewer' for scholarly Journals such IEEE Transactions on Magnetics, IEEE Transactions on Applied Superconductivity, Optics Letters, Solid State Phenomena, etc... His research mainly focuses on magnetism and magnetic materials, especially the rare earth iron garnets (REIGs) which exhibit magnetodielectric effects and the REIGs (and non iron-garnet) thin films which have emerged as an important component of magnonic, spintronic, photonic and magnetophotonic devices. Now his current research interests include the pursuit of the study at low temperature and in high magnetic fields the anomalous magnetic properties of the praseodymium (Pr) ions, which belongs to the first half of the rare-earth series, in particular in the Pr-based compounds such the Pr-substituted yttrium iron garnet (Pr-YIG) and the PrBCO cuprates. His work on garnets continues today, with the development of optical insulators based on cerium-substituted garnets and the continued analysis of the behavior of dysprosium-and terbium-substituted yttrium iron garnets. Beyond garnets, his work on fiber optic phenomena stands out, such as his development of magnetic field sensors combining optical fibers and magnetic fluids. His development of magnetic cobalt ferrite particles for electromagnetic and optical applications offers significant advantages in the creation of energy-absorbing composite materials, for example.