G. Krabbes

TL;DR: In this article, the formation of cracks along the c-direction was investigated microscopically before and after cooling in bulk superconductors fabricated by top-seeded-melt growth (TSMG).

TL;DR: In this paper, the interdependence between structural ordering and superconducting properties is discussed and a structural model based on a short-range ordering of oxygen in the Cu-O chains responsible for superconductivity is proposed.

TL;DR: In this paper, the authors present the results of this optimization which have brought the expected improvements and which are in excellent accordance with theory with respect to the results obtained in this optimization.

TL;DR: In this paper, the authors investigated the magnetoresistance of polycrystalline samples of the bilayer Ruddlesden-Popper compound La1.2Nd0.6Mn2O7 and showed that at T2=38 K the compound reveals a transition from the ferromagnetic to an antiferromagnetic spin arrangement of alternating bilayers, which undergoes a first order metamagnetic transition towards ferromagnetism in a magnetic field of ∼3.5 kOe at 20 K.

TL;DR: In this article, the electronic structure and elementary excitations of undoped, one-and two-dimensional cuprates were studied using high-energy spectroscopies such as X-ray absorption, photo-emission and electron energy-loss spectroscopy.