68 citations · 531 across the 19 of their papers we have counts for
19 papers
Extended study of crystal structures, optical properties and vibrational spectra of polar 2-aminopyrimidinium hydrogen phosphite and bis(2-aminopyrimidinium) sulfate monohydrate and two 2-aminopyrimidinium hydrogen sulfate polymorphs
Irena Matulkova, Ladislav Bohaty, Petra Becker +6
This study aimed primarily at completing and extending the characterization of the crystallographic, spectroscopic and optical properties of polar, biaxial, optically negative 2-am…
Rotational phase transitions in antifluorite-type osmate and iridate compounds
A. Bertin, L. Kiefer, P. Becker +2
We present temperature-dependent single-crystal diffraction results on seven antifluorite-type compounds with =Os or Ir: KOsCl, OsBr with =K, Rb,…
Spin-orbit entangled j=1/2 moments in BaCeIrO -- a frustrated fcc quantum magnet
A. Revelli, C. C. Loo, D. Kiese +16
We establish the double perovskite BaCeIrO as a nearly ideal model system for j=1/2 moments, with resonant inelastic x-ray scattering indicating a deviation of less than 1%…
Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO) with 3d configuration
S. Holbein, M. Ackermann, L. Chapon +9
The crystal structure of the double tungstate NaFe(WO) arises from that of the spin-driven multiferroic MnWO by inserting non-magnetic Na layers. NaFe(WO) exhib…
Low-temperature ordered phases of the spin- XXZ chain system CsCoCl
O. Breunig, M. Garst, A. Rosch +6
In this study the magnetic order of the spin-1/2 XXZ chain system CsCoCl in a temperature range from 50 mK to 0.5 K and in applied magnetic fields up to 3.5 T is investigat…
Anisotropy study of multiferroicity in the pyroxene NaFeGeO
M. Ackermann, L. Andersen, T. Lorenz +2
We present a study of the anisotropy of the dielectric, magnetic and magnetoelastic properties of the multiferroic clinopyroxene NaFeGeO. Pyroelectric currents, dielectric…
Critical slowing down near the multiferroic phase transition in MnWO
D. Niermann, C. P. Grams, P. Becker +3
By using broadband dielectric spectroscopy in the radiofrequency and microwave range we studied the magnetoelectric dynamics in the multiferroic chiral antiferromagnet MnWO. Ab…
Magnetoelectric properties of [FeCl(HO)] with K, Rb, Cs
M. Ackermann, T. Lorenz, P. Becker +1
The compounds [FeCl(HO)] with K, Rb, Cs are identified as new linear magnetoelectric materials. We present a detailed investigation of their linear magnetoelectri…
Infrared-active phonon modes in monoclinic multiferroic MnWO4
T. Möller, P. Becker, L. Bohaty +2
We report on polarized infrared reflectivity measurements of multiferroic, monoclinic MnWO4 between 10K and 295K. The full dielectric tensor and the frequency dependence of the ori…
Domain dynamics in the multiferroic phase of MnWO4
D. Niermann, C. P. Grams, M. Schalenbach +5
By using broadband linear and nonlinear dielectric spectroscopy we studied the magnetoelectric dynamics in the chiral antiferromagnet MnWO4. In the multiferroic phase the dielectri…
Thermodynamic properties of the new multiferroic material (NH)[FeCl(HO)]
M. Ackermann, D. Brüning, T. Lorenz +2
(NH)[FeCl(HO)], a member of the family of antiferromagnetic [Fe(HO)] compounds ( = halide ion, = alkali metal or ammonium ion) is classified as…
The spin- XXZ chain system CsCoCl in a transverse magnetic field
O. Breunig, M. Garst, E. Sela +5
Comparing high-resolution specific heat and thermal expansion measurements to exact finite-size diagonalization, we demonstrate that CsCoCl for a magnetic field along the c…
The biaxial nonlinear crystal BiB3O6 as a polarization entangled photon source using non-collinear type-II parametric down-conversion
A. Halevy, E. Megidish, L. Dovrat +3
We describe the full characterization of the biaxial nonlinear crystal BiB3O6 (BiBO) as a polarization entangled photon source using non-collinear type-II parametric down-conversio…
Time-resolved imaging of magnetoelectric domain switching in multiferroic MnWO4
T. Hoffmann, P. Thielen, P. Becker +2
By an electrical-pump--optical-probe technique we show that the electric-field-induced reversal of the magnetic order parameter in multiferroic MnWO occurs on the time scale of…
Local symmetry and magnetic anisotropy in multiferroic MnWO4 and antiferromagnetic CoWO4 studied by soft x-ray absorption spectroscopy
N. Hollmann, Z. Hu, T. Willers +7
Soft x-ray absorption experiments on the transition metal L2,3 edge of multiferroic MnWO4 and antiferromagnetic CoWO4 are presented. The observed linear polarization dependence, an…
Translation domains in multiferroics
D. Meier, N. Leo, T. Jungk +4
Translation domains differing in the phase but not in the orientation of the corresponding order parameter are resolved in two types of multiferroics. Hexagonal (h-) YMnO is a…
Second harmonic generation on incommensurate structures: The case of multiferroic MnWO4
D. Meier, N. Leo, G. Yuan +4
A comprehensive analysis of optical second harmonic generation (SHG) on an incommensurate (IC) magnetically ordered state is presented using multiferroic MnWO4 as model compound. T…
Muon-spin relaxation and heat capacity measurements on the magnetoelectric and multiferroic pyroxenes LiFeSi2O6 and NaFeSi2O6
P. J. Baker, H. J. Lewtas, S. J. Blundell +6
The results of muon-spin relaxation and heat capacity measurements on two pyroxene compounds LiFeSi2O6 and NaFeSi2O6 demonstrate that despite their underlying structural similarity…
Topology and manipulation of multiferroic hybrid domains in MnWO
D. Meier, N. Leo, M. Maringer +4
An investigation of the spatially resolved distribution of domains in the multiferroic phase of MnWO reveals that characteristic features of magnetic and ferroelectric domains…