Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 8: Multiferroics and magnetoelectrics I (joint session MA/KFM)
KFM 8.7: Vortrag
Dienstag, 13. März 2018, 11:15–11:30, EB 202
Giant magnetoelectric coupling in the low-dimensional ferrimagnetic iron oxoselenite Fe2O(SeO3)2 — •Peter Lemmens1,2, Vladimir Gnezdilov3, Dirk Wulferding1,2, Peter Berdonosov4, E.S. Kozlyakova4, E. Kuznetsova4, Olga Volkova4, and Alexander Vasiliev4 — 1IPKM, TU-BS, Braunschweig, Germany — 2LENA, TU-BS, Braunschweig, Germany — 3ILTPE, NASU, Kharkov, Ukraine — 4MSU, Moscow, Russia
The newly synthesized oxoselenite compound Fe2O(SeO3)2 hosts Fe ions in distorted tetrahedral coordination. An anomalous gain in phonon intensity observed within the ferromagnetically ordered phase (TC = 105 K) hints towards an enhanced electronic polarizability and related giant magnetoelectric coupling. Further anomalous modes of possible magnetic origin are discussed in connection with a strong Dzyaloshinskii-Moriya interaction. Work supported by DFG Project LE967/16-1.