Regensburg 2019 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 7: Multiferroics
KFM 7.1: Vortrag
Montag, 1. April 2019, 15:00–15:20, H47
Insights into the coupled domains in conical spin-driven multiferroics — •Jonas K. H. Fischer, Kenta Kimura, Ryusuke Misawa, and Tsuyoshi Kimura — Department of Advanced Materials Science, University of Tokyo, Japan
Multiferroics offer opportunities for new and previously unattainable applications [1]. Especially sought-after is the mutual control of magnetization and electric polarization by electric and magnetic fields, the so-called magnetoelectric effect.
The "conical spin structure" is a rather complicated spiral magnetic order that breaks both time-reversal and space-inversion symmetries and leads to a ferromagnetic-ferroelectric, i.e., multiferroic ground state. So far only a few conical spin-driven multiferroics have been reported, among them spinel-type CoCr2O4 [2] and olivine-type Mn2GeO4 [3]. Recently, an intriguing domain coupling, that is, magnetoelectric inversion of domain patterns, has been reported in Mn2GeO4 [4,5].
However, the coupling mechanism among the various domains of the conical spin-driven multiferroics has not yet been fully understood. In addition to electric and magnetic fields, uniaxial pressure is expected to affect their domain coupling. In this study, the effect of uniaxial stress on the magnetoelectric properties is examined.
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