178 citations · 439 across the 9 of their papers we have counts for
9 papers
Excitations and relaxation dynamics in multiferroic GeV4S8 studied by THz and dielectric spectroscopy
S. Reschke, Zhe Wang, F. Mayr +4
We report on THz time-domain spectroscopy on multiferroic GeV4S8, which undergoes orbital ordering at a Jahn-Teller transition at 30.5 K and exhibits antiferromagnetic order below…
Polar and magnetic order in GaV4Se8
E. Ruff, A. Butykai, K. Geirhos +6
In the present work, we provide results from specific heat, magnetic susceptibility, dielectric constant, ac conductivity, and electrical polarization measurements performed on the…
Structural, magnetic, electric, dielectric, and thermodynamic properties of multiferroic GeV4S8
S. Widmann, A. Günther, E. Ruff +4
The lacunar spinel GeV4S8 undergoes orbital and ferroelectric ordering at the Jahn-Teller transition around 30 K and exhibits antiferromagnetic order below about 14 K. In addition…
Conductivity contrast and tunneling charge transport in the vortex-like ferroelectric domain patterns of multiferroic hexagonal YMnO3
E. Ruff, S. Krohns, M. Lilienblum +4
We deduce the intrinsic conductivity properties of the ferroelectric domain walls around the topologically protected domain vortex cores in multiferroic YMnO3. This is achieved by…
On the multiferroic skyrmion-host GaV4S8
S. Widmann, E. Ruff, A. Günther +6
The lacunar spinel GaV4S8 exhibits orbital ordering at 44 K and shows a complex magnetic phase diagram below 12.7 K, which includes ferromagnetic and cycloidal spin order. At low b…
Polar Dynamics at the Jahn-Teller Transition in Ferroelectric GaV4S8
Zhe Wang, E. Ruff, M. Schmidt +4
We present a dielectric spectroscopy study of the polar dynamics linked to the orbitally driven ferroelectric transition in the skyrmion host GaV4S8. By combining THz and MHz-GHz s…
Magnetoelectric effects in the skyrmion host material Cu2OSeO3
E. Ruff, P. Lunkenheimer, A. Loidl +2
Insulating helimagnetic Cu2OSeO3 shows sizeable magnetoelectric effects in its skyrmion phase. Using magnetization measurements, magneto-current analysis and dielectric spectroscop…
Multiferroicity and skyrmions carrying electric polarization in GaV4S8
E. Ruff, S. Widmann, P. Lunkenheimer +4
Skyrmions are whirl like topological spin objects with high potential for future magnetic data storage. It is a fundamental question, relevant for both basic research and applicati…
Dielectric signature of charge order in lanthanum nickelates
P. Sippel, S. Krohns, E. Thoms +7
Three charge-ordering lanthanum nickelates La2-xAxNiO4, substituted with specific amounts of A = Sr, Ca, and Ba to achieve commensurate charge order, are investigated using broadba…