387 research outputs found
Evidence for an antiferromagnetic component in the magnetic structure of ZrZn2
Zero-field muon spin rotation experiments provide evidence for an
antiferromagnetic component in the magnetic structure of the intermetallics
ZrZn2.Comment: 5 pages, 2 figure
A comparative three-dimensional neutron depolarization study on RCrO4 oxides (R=Y, Er, Tm, Yb)
Three-dimensional neutron depolarization experiments have been performed on RCrO4 (R=Y, Er, Tm, Yb) powder samples in order to gain insight into their magnetic domain structure in the submicrometer range. The temperature evolution of both the average domain size and the net magnetization of each compound has been studied for different applied magnetic fields. The largest average domain size at zero external magnetic field was found in YbCrO4. The effect of an applied magnetic field on the magnetic domain structure is relatively small in ErCrO4 and TmCrO4, when compared to YCrO4 and YbCrO4 where the average domain size even surpasses the average particle size determined by Scanning Electron Microscopy studies.</p
Intertwined Precursor Supply during Biosynthesis of the Catecholate-Hydroxamate Siderophores Qinichelins in Streptomyces sp MBT76
Bio-organic SynthesisMicrobial Biotechnolog
Absence of zero field muon spin relaxation induced by superconductivity in the B phase of UPt
We present muon spin relaxation measurements performed on crystals of the
heavy fermion superconductor UPt. In zero applied field, contrary to a
previous report, we do not observe an increase of the internal magnetic field
in the lower superconducting phase (the B phase). Our result gives an
experimental upper bound of the magnetic field that could be associated with
the superconducting state.Comment: 4 pages, REVTeX 3.0, 2 PostScript figure
Relationship between the magnetic hyperfine field and the magnetic moment
Based on experimental data it is shown, for some chosen alloys and compounds
of iron, that there is no one unique relationship between the 57Fe-site
magnetic hyperfine field, Bhf, and the magnetic moment per Fe atom, m. Instead,
the Bhf-m plot consists of several branches, each of them being characteristic
of a given alloy or compound. Consequently, the effective proportionality
constant (hyperfine coupling constant) depends on the alloy system or compound,
and for a given alloy system or compound it depends on the composition or even
on the lattice site. Consequently, the scaling of Bhf into the underlying m
cannot be done a priopri
Identification of glucose kinase dependent and independent pathways for carbon control of primary metabolism, development and antibiotic production in Streptomyces coelicolor by quantitative proteomics
Bio-organic SynthesisMicrobial Biotechnolog
Metabolomics-driven discovery of a prenylated isatin antibiotic produced by Streptomyces species MBT28
Microbial Biotechnolog
Evidence for a two component magnetic response in UPt3
The magnetic response of the heavy fermion superconductor UPt_3 has been
investigated on a microscopic scale by muon Knight shift studies. Two distinct
and isotropic Knight shifts have been found for the field in the basal plane.
While the volume fractions associated with the two Knight shifts are
approximately equal at low and high temperatures, they show a dramatic and
opposite temperature dependence around T_N. Our results are independent on the
precise muon localization site. We conclude that UPt_3 is characterized by a
two component magnetic response.Comment: 5 pages, 4 figure
- …