Dr. Martin Ottesen
Research topic: Smart materials for Energy Applications and Complex Intermetallics
Contact: mao@inano.au.dk
Dr. Ottesen studied under the supervision of Assoc. Prof. Martin Bremholm during his MSc and Ph.D. studies. Here, Martin investigated the interplay between the crystal lattice and physical properties in perovskites exhibiting exotic physical phenomena such as frustrated magnetism, multiferroicity, spin transitions, and metal-insulator transitions. The properties of these strongly correlated materials is intrinsically tied to the lattice which can be modulated through the application of hydrostatic pressure using diamond anvil cells. Diamond is amongst the hardest materials known and has the distinct advantage of being (semi)transparent to both visible light and X-rays. As such, structural information on both the long and short length scale can be obtained by using both diffraction and spectroscopy techniques such as powder and single crystal X-ray diffraction, Raman spectroscopy, and X-ray absorption spectroscopy.
Currently a researcher with Prof. Dr. Mudring with the goal of synthesizing and studying functional materials for magneto refrigeration.
Publications:
- Keshavarz, M. Ottesen, S. Wiedmann, M. Wharmby, R. Küchler, H. Yuan,
E. Debroye, J. A. Steele, J. Martens, N. E. Hussey, M. Bremholm, M. B.Roeffaers,
J. Hofkens, Tuning the Structural and Optoelectronic Properties of Cs2AgBiBr6Double‐Perovskite Single Crystals through Alkali‐Metal Substitution, Advanced Materials, 2019, 31(24), 1–8. - Keshavarz, E. Debroye, M. Ottesen, C. Martin, H. Zhang, E. Fron, R. Küchler,
J. Steele, M. Bremholm, J. Van de Vondel, H. I. Wang, M. Bonn, M. Roeffaers, S.
Wiedmann, and J. Hofkens, Tracking Structural Phase Transitions in Lead‐Halide Perovskites by Means of Thermal Expansion, Advanced Materials, 2020, 32(40), 1-10. - H. Kronbo, M. Ottesen, M. F. Hansen, E. Ehrenreich-Petersen, Y. Meng, and
M. Bremholm, Discovery of Rhombohedral NaIrO3Polymorph by In Situ High-Pressure Synthesis of High-Oxidation-State Materials Using Laser Heating in Diamond Anvil Cells, Inorganic Chemistry, 2020, 59(21), 15780-15787. - H. Kronbo, E. Ehrenreich-Petersen, M. Ottesen, F. Menescardi, D. Ceresoli,
and M. Bremholm, High-Pressure, High-Temperature Studies of Phase Transitions in SrOsO3─Discovery of a Post-Perovskite, Inorganic Chemistry, 2022, 61(48), 19088–19096 - M. Ottesen, E. Ehrenreich-Petersen, C. H. Kronbo, F. Baudelet, L. Nataf, I. Kantor, M. R. V. Jørgensen, and M. Bremholm, under review at PRB, 2023