jfischercrystal.k.u-tokyo.ac.jp
6D7 04-7136-3751
The following is a short introductory video to our research on magnetoelectric multiferroics. In these materials an electric “imitation field” can be used to save data magnetically – without wasting electricity.
The aim of our research is to find and improve these multiferroics, so that they can one day power computers, phones, and completely new devices.
Profile
Jonas Fischer gained his university-entrance diploma (Abitur) in 2008 graduating from the Jakob-Fugger-Gymnasium in Augsburg. From October 2008 to February 2015, he studied Physics at the University of Augsburg. In his Bachelor thesis, he used Terahertz spectroscopy to study Iron-based superconductors. During his stay in the FrontierLab program at Osaka University in the winter of 2012/2013, he continued the investigation of these materials. He grew crystals and performed magnetization and resistivity measurements under the supervision of Prof. Setsuko Tajima. Returning to Augsburg for his Master thesis, he utilized broadband dielectric spectroscopy to study glass-forming liquids confined in the nanopores of Metal-organic frameworks.
Since April 2015, he worked as a researcher at the chair of Experimental Physics V, finishing his PhD in September 2018. His research involved the search for multiferroic and ferroelectric materials among the organic charge-transfer salts, employing dielectric spectroscopy and polarization measurements in a wide frequency and temperature range. He participated in the collaborative research center TRR 80 and was a Board member of its integrated graduate school.
Since November 2018 he is a JSPS Postdoctoral Fellow in Prof. Kimura’s group at Tokyo University. He aims to elucidate the coupling mechanism in conical spin-driven multiferroics, by synthesizing new materials in this family and exploring possible new functionalities of these systems.
Publication List
” Dielectric ordering of water molecules arranged in a dipolar lattice “
M. A. Belyanchikov, M. Savinov, Z. V. Bedran, P. Bednyakov, P. Proschek, J. Prokleska, V. A. Abalmasov, J. Petzelt, E. S. Zhukova, V. G. Thomas, A. Dudka, A. Zhugayevych, A. S.Prokhorov, V. B. Anzin, R. K. Kremer, J. K. H. Fischer, P. Lunkenheimer, A. Loidl, E. Uykur, M. Dressel, and B. Gorshunov
Nat. Commun. 11, 3927 (2020).
“Domain switching and exchange bias control by electric field in the multiferroic conical magnet Mn2GeO4”
J. K. H. Fischer, H. Ueda, and T. Kimura
Phys. Rev. B 102, 054412 (2020). Editor’s Suggestion
“Supercooled water confined in a metal-organic framework”
J. K. H. Fischer, P. Sippel, D. Denysenko, P. Lunkenheimer, D. Volkmer, and A. Loidl
Commun. Phys. 3, 95 (2020).
“Glycerol confined in zeolitic imidazolate frameworks: The temperature-dependent cooperativity length scale of glassy freezing”
M. Uhl, J. K. H. Fischer, P. Sippel, H. Bunzen, P. Lunkenheimer, D. Volkmer, and A. Loidl, J. Chem. Phys. 150, 024504 (2019).
“Relaxation dynamics in the one-dimensional organic charge-transfer salt δ-(EDT-TTF-CONMe2)2Br”
J. K. H. Fischer, P. Lunkenheimer, C. Leva, S. M. Winter, M. Lang, C. Mézière, P. Batail, A. Loidl, and R. S. Manna, Phys. Rev. B 97, 235156 (2018).
“Evidence for electronically-driven ferroelectricity in a strongly correlated dimerized BEDT-TTF molecular conductor”
E. Gati, J. K. H. Fischer, P. Lunkenheimer, D. Zielke, S. Köhler, F. Kolb, H.-A. Krug von Nidda, S. M. Winter, H. Schubert, J. A. Schlueter, H. O. Jeschke, R. Valenti, M. Lang, Phys. Rev. Lett. 120, 247601 (2018).
“Single-Crystal to Single-Crystal Transformation of a Nonporous Fe(II) Metal–Organic Framework into a Porous Metal–Organic Framework via a Solid-State Reaction”
S. Spirkl, M. Grzywa, S. Reschke, J. K. H. Fischer, P. Sippel, S. Demeshko, H.-A. Krug von Nidda, and D. Volkmer, Inorg. Chem. 56, 12337 (2017).
“Conflicting evidence for ferroelectricity”
G. D’Avino, M. Souto, M. Masino, J. K. H. Fischer, I. Ratera, X. Fontrodona, G. Giovannetti, M. J. Verstraete, A. Painelli, P. Lunkenheimer, J. Veciana, A. Girlando, Nature 547, E9 (2017).
“Effect of adding nanometer-sized heterogeneities on the structural dynamics and the excess wing of a molecular glass former”
S. Gupta, J. K. H. Fischer, P. Lunkenheimer, A. Loidl, E. Novak, N. Jalarvo, M. Ohl, Scientific Reports 6, 35034 (2016).
“Metal-organic frameworks as host materials of confined supercooled liquids”
J. K. H. Fischer, P. Sippel, D. Denysenko, P. Lunkenheimer, D. Volkmer, A. Loidl, J. Chem. Phys. 143, 154505 (2015).
“Orbital-selective metal-insulator transtition and gap formation above TC in superconducting Rb1-xFe2-ySe2”
Z. Wang, M. Schmidt, J. Fischer, V. Tsurkan, M. Greger, D. Vollhardt, A. Loidl, J. Deisenhofer, Nature Comm. 5, 3202 (2014).