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- Suresh Singh, Nelia Wanderka, Klaus Kiefer, Konrad Siemensmeyer, John Banhart
- Ultramicroscopy
- 2011
Splat-quenched, as-cast and aged (2h at 600 °C after casting) AlCoCrCuFeNi high entropy alloys were investigated by means of transmission electron microscopy and three-dimensional atom probe (3D-AP).… (More)
- Seung-Hun Lee, Hideaki Kikuchi, +4 authors Klaus Kiefer
- Nature materials
- 2007
A three-dimensional system of interacting spins typically develops static long-range order when it is cooled. If the spins are quantum (S=1/2), however, novel quantum paramagnetic states may appear.… (More)
- Radu Coldea, David A Tennant, +6 authors Klaus Kiefer
- Science
- 2010
Quantum phase transitions take place between distinct phases of matter at zero temperature. Near the transition point, exotic quantum symmetries can emerge that govern the excitation spectrum of the… (More)
- Conradin Kraemer, Neda Nikseresht, +14 authors Henrik M. Rønnow
- Science
- 2012
Magnetism has been predicted to occur in systems in which dipolar interactions dominate exchange. We present neutron scattering, specific heat, and magnetic susceptibility data for LiErF(4),… (More)
- Björn Willenberg, M. Schäpers, +12 authors Anja U. B. Wolter
- Physical review letters
- 2012
We present a combined neutron diffraction and bulk thermodynamic study of the natural mineral linarite PbCuSO4(OH)2, this way establishing the nature of the ground-state magnetic order. An… (More)
- Benedikt Thielemann, Ch Rüegg, +12 authors Joël Mesot
- Physical review letters
- 2009
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon modes at low fields… (More)
- Vasile O. Garlea, Alon Schclar Neta Rabin Amir Averbuch Valery Zheludev, +9 authors Martin Boehm
- Physical review letters
- 2007
The weakly coupled quasi-one-dimensional spin ladder compound (CH3)2CHNH3CuCl3 is studied by neutron scattering in magnetic fields exceeding the critical field of Bose-Einstein condensation of… (More)
- Ch Rüegg, Klaus Kiefer, +11 authors Karl W Krämer
- Physical review letters
- 2008
The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C5H12N)2CuBr4 is studied by measurements of the specific heat and the magnetocaloric effect.… (More)
- Sunil Nair, Oliver Stockert, +8 authors Frank Steglich
- Proceedings of the National Academy of Sciences…
- 2010
The apparently inimical relationship between magnetism and superconductivity has come under increasing scrutiny in a wide range of material classes, where the free energy landscape conspires to bring… (More)
Fe3 N and Fe3 C nanocomposites have a wide range of applications thanks to their ceramic nature, magnetic properties, conductivity and catalytic activity, just to cite some. In many fields optimal… (More)