Time-scale of the intra-unit-cell magnetism in high-Tc cuprates
The phase diagram of high temperature superconductors is dominated by a pseudo-gap phase with highly unusual physical properties. Polarized neutron scattering experiments reported the appearance of an intre-unit cell magnetism when entering the PG state in three different cuprate families. However, other magnetic probes such as muons spin resonance (uSR) and nuclear magnetic resonance experiments could not see the static local fields expected for the magnetic order. Nevertheless, a recent uSR study reports a dynamic relaxation rate in longitudinal applied field in single crystals of YBa2Cu3O6+x. The amplitude of the fluctuating magnetic fields is of the order of the magnitude deduced from polarized neutron diffraction. The magnetic correlations are fluctuating at about 10^8 Hz at low temperature, corresponding to Fourier time varying in the range [0.01-20]ns. Our previous Neutron Backscattering measurements on IN16B also show the existence of quasi-elastic scattering possibly associated with such fluctuations. We ask for 9 days on the Neutron Spin Echo Spectrometer IN11 to confirm the magnetic nature of this scattering and determine the time-scale of the corresponding fluctuations.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
BOUNOUA Dalila; Bourges; FOUQUET Peter; MANGIN-THRO Lucile; MARTIN Nicolas; SIDIS Yvan and VERSEILS Marine. (2020). Time-scale of the intra-unit-cell magnetism in high-Tc cuprates. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-567
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.