921 citations · 10.1k across the 159 of their papers we have counts for
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Competition of magnetism and superconductivity in underdoped (Ba1-xKx)Fe2As2
Marianne Rotter, Marcus Tegel, Inga Schellenberg +7
Polycrystalline samples of underdoped (Ba1-xKx)Fe2As2 (x<=0.4) were synthesized and studied by x-ray powder diffraction, magnetic susceptibility, specific heat and 57Fe-Moessbauer-…
Colossal dielectric constant up to GHz at room temperature
S. Krohns, P. Lunkenheimer, Ch. Kant +5
The search for new materials with extremely high ("colossal") dielectric constants, required for future electronics, is one of the most active fields of modern materials science. H…
Spin-driven Phase Transitions in ZnCrSe and ZnCrS Probed by High Resolution Synchrotron X-ray and Neutron Powder Diffraction
F. Yokaichiya, A. Krimmel, V. Tsurkan +7
The crystal and magnetic structures of the spinel compounds ZnCrS and ZnCrSe were investigated by high resolution powder synchrotron and neutron diffraction. ZnCr$_…
Colossal magnetocapacitive effect in differently synthesized and doped CdCr2S4
S. Krohns, F. Schrettle, P. Lunkenheimer +2
In the present work, we address the question of an impurity-related origin of the colossal magnetocapacitive effect in the spinel system CdCr2S4. We demonstrate that a strong varia…
Electron Spin Resonance across the Charge-ordering Transition in YBaMn2O6
D. Zakharov, J. Deisenhofer, H. -A. Krug von Nidda +3
We investigated the metal-ordered manganite system YBaMn2O6 using electron spin resonance (ESR) in the paramagnetic regime across the charge-ordering and structural phase transitio…
Optical Spectroscopy in CoO: Phonons, Electric, and Magnetic Excitations
Ch. Kant, T. Rudolf, F. Schrettle +5
The reflectivity of single-crystalline CoO has been studied by optical spectroscopy for wave numbers ranging from 100 to 28,000\wn and for temperatures 8 325 K\@. A splitti…
Chain Formation by Spin Pentamers in eta-Na9V14O35
D. V. Zakharov, H. -A. Krug von Nidda, J. Deisenhofer +4
The nature of the gapped ground state in the quasi-one-dimensional compound eta-Na9V14O35 cannot easily be understood, if one takes into account the odd number of spins on each str…
Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3
M. V. Eremin, D. V. Zakharov, H. -A. Krug von Nidda +6
The spin dynamics of the prototypical quasi one-dimensional antiferromagnetic Heisenberg spin S=1/2 chain KCuF3 is investigated by electron spin resonance spectroscopy. Our analysi…
Optical properties of ZnCr2Se4 - Spin-phonon coupling and electronic d-d-like excitations
T. Rudolf, Ch. Kant, F. Mayr +4
We studied the optical properties of antiferromagnetic ZnCr2Se4 by infrared spectroscopy up to 28,000 cm-1 and for temperatures from 5 to 295 K. At the magnetic phase transition at…