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Mar 20 – 23, 2023
Campus Garching
Europe/Berlin timezone

Chiral Magnons in Multiferroic Ni3TeO6

Mar 22, 2023, 5:20 PM
MW 2 001 - Lecture hall (Fakultät für Maschinenwesen)

MW 2 001 - Lecture hall

Fakultät für Maschinenwesen

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Talk (17 + 3 min) Magnetism, Superconductivity, Topological Systems, Magnetic Thin Films an other electronic phenomena Bulk Magnetism 1


Jakob Lass (Paul Scherrer Institut)


The search for novel materials exhibiting non-trivial properties is the main task of solid state research. Ranging from high temperature superconductivity over quantum computers, novel batteries to spintronics and multi-functional materials, this field spans a wide range of disciplines and material types. One specific field of interest within magnetism is multiferroicity where especially materials experiencing strong couplings are promising.

One such material is the multiferroic Ni$_3$TeO$_6$ which undergoes a hysteresis-free first order spin-flop transition from an antiferromagnetic collinear order to an incommensurate helical structure at 8.6 T along c, sporting one of the larges magnetoelectric responses measured. This transition is controllable through both magnetic and electric field. The ordering vector jumps from (0, 0, 1.5) to (0, 0, 1.5$\pm\delta$) with $\delta\sim$ 0.18. This position is mirrored in the minima of the low field spin-wave gap and in magnetic field the gaps move linearly but in opposite directions, with a cross over around the known phase transition field of 8.6 T. We hypothesize that these magnons condense at the phase transition establishing the high field ground state and have opposite chirality. Due the crystal symmetry (R3) the three distinct magnetic Ni ions are allowed to move along c relative to each other coupling the lattice, electric and magnetic degrees of freedom. In this talk I will present our resent polarized inelastic results.

Primary authors

Dr Alexandra Turrini (Paul Scherrer Institut) Daniel Mazzone (Paul Scherrer Institute) Jakob Lass (Paul Scherrer Institut) Kim Lefmann (Niels Bohr Institute, University of Copenhagen) Rasmus Toft-Petersen (Technical University of Denmark) Dr Romain Sibille (Paul Scherrer Institut)

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