Vortex motion in type-II superconductors probed by muon spin rotation and small-angle neutron scattering

We report muon spin rotation (μSR) measurements on the moving vortex lattice (VL) in the type-II superconductor Pb-In, backed up by small-angle neutron scattering (SANS) observations on the same sample. We observe a motional narrowing of the μSR lineshape p(B) and by SANS, alignment of the VL to the direction of vortex motion. We have calculated the μSR lineshape expected with a range of orientations of the moving VL. We demonstrate how the new μSR results give information on the moving VL which is complementary and consistent with the SANS data

Within walls: private life in the German Democratic Republic

Private life in the German Democratic Republic (GDR) is often seen as having been virtually non-existent, simply another East German commodity forever in short supply. In part this had to do with the common perception that private life and state socialism were at odds by definition, to the extent that the private person has no legal identity or political standing outside the socialist community. The East German regime's infamous surveillance techniques, best illustrated in the notorious exploits of the state's sprawling security force - the Stasi - and its reserve army of 'unofficial collaborators', further dramatized the full penetration of the state into the private sphere. Within Walls takes a different perspective. Paul Betts shows how, despite the primacy of public identities, the private sphere assumed central importance in the GDR from the very outset, and was especially pronounced in the regime's former capital city. In a world in which social interaction was heavily monitored, private life functioned for many citizens as a cherished arena of individuality, alternative identity-formation, and potential dissent. The book carefully charts the changing meaning of private life in the GDR across a variety of fields, ranging from law to photography, religion to interior decoration, family living to memoir literature, revealing the myriad ways in which privacy was expressed, staged, and defended by citizens living in a communist society

A reconstruction of the real space magnetic field distribution in the mixed state of Sr2RuO4 from small-angle neutron scattering measurements

We have measured the diffracted neutron scattering intensities from the square magnetic flux lattice in the perovskite superconductor Sr2RuO4, which is thought to exhibit p-wave pairing with a two-component order parameter. The relative intensities of different flux lattice Bragg reflections over a wide range of field and temperature have been shown to be inconsistent with a single component Ginzburg-Landau theory but qualitatively agree with a two-component p-wave Ginzburg-Landau theory.</p