Hadjipanayis has more than 25 years experience in the field of magnetic materials. Born in Cyprus, he received his B.Sc. at the University of Athens (1969). His early work in magnetic materials was at the University of Manitoba on the magnetic hardening of bulk Fe-Pt-Ni alloys (M.Sc., 1974) and on the structural, microstructural, and magnetic properties of bulk CoPt magnets (Pd.D., 1979). As a post-doctoral fellow at the University of Nebraska (1979-80) he continued his studies on the magnetic and electrical properties of amorphous materials with emphasis on metallic glasses. He then moved to industry (Kollmorgen Corporation) for two years (1980-82), where he joined a team to improve the magnetic properties of (Co,Fe)-rich 2:17 magnets, under the supervision of K. J. Strnat. Later at Kollmorgen he led the efforts to develop a Co-free permanent magnet which resulted in the discovery of Nd-Fe-B supermagnets. Hadjipanayis then returned to academia as an Assistant Professor at Kansas University in 1982, where he focused on the hysteresis behavior of Fe-rare earth amorphous materials and Nd-Fe-B-based permanent magnets. He later started a program in collaboration with Sorensen and Klabunde at Kansas State to fabricate ultrafine magnetic particles and study their structural and magnetic properties.

Hadjipanayis came to the University of Delaware as a Full Professor in 1989. His current interests include three main topics: (1) magnetic nanoparticles made by evaporation, (2) thin films, bilayers, and multilayers, including exchange coupled films, spin valves and films for high density magnetic recording, and (3) permanent magnets including high energy magnets, nanocomposite magnets, and high temperature magnets. Hadjipanayis is the founder and present Director of the Consortium for Advanced Magnets. He has advised 20 graduate students and published over 300 papers. He conducts a very active research program at the University of Delaware and succeeded in setting up a modern Magnetics Lab fully equipped with state-of-the-art SQUID, and VSM magnetometers, and a high resolution scanning transmission electron microscope. He has written several chapters in books and organized and directed conferences, including three NATO Advanced Study Institutes. He also regularly teaches courses in magnetic materials and electron microscopy.

Publications — over 300

1. "Effect of Cr Substitution on the Formation and Magnetic Properties of Sm₂(Fe,Cr)₁₇C_x Alloys," Z. Chen and G. C. Hadjipanayis, IEEE Trans. Magn. MAG-33, 3856 (1977).
2. "Magnetic Properties and Microstructure of Fe-O and Co-O Thin Films," D. V. Dimitrov and G. C. Hadjipanayis, IEEE Trans. Magn. MAG-33, 4363 (1977).
3. "Effect of Preparation Conditions on the Hysteresis Behavior of Fe-SiO₂," J. A. Christodoulides, N. B. Shevchenko, G. C. Hadjipanayis, and V. Papaefthymiou, J. Magn. Magn. Mat. 166, 283 (1997).
4. "Microstructure and Magnetic Domains," G. C. Hadjipanayis, in Rare Earth Iron Permanent Magnets, ed J. M. D. Coey, Oxford University Press, Oxford (1996).
5. "Giant Magnetoresistance in Cu-Mn-Al," L. Yiping, A. Murthy, H. Wan, and G. C. Hadjipanayis, Phys. Rev. B 54, 3033 (1996).
6. "Magnetic and Structural Properties of Nanoparticles, G. C. Hadjipanayis, in Nanomaterials: Synthesis, Properties, and Applications, ed. A. S. Edelstein and R. C. Cammarata, Institute of Physics Publishing, Bristol, PA, 1996.
7. "Size Dependent Magnetic Properties of MnFe₂O₄ Nanoscale Particles Prepared by Coprecipitation," J. P Chen, C. M. Sorensen, K. J. Klabunde, G. C. Hadjipanayis, E. Devlin, and A. Kostikas, Phys. Rev. B 54, 2988 (1996).