Neutron-diffraction study of stripe order inLa2NiO4+δwithδ=215

A Neutron diffraction study of multiferroics RMn2O5

The magnetic properties of RMn2O5 multiferrroics as obtained by unpolarized and polarized neutron diffraction experiments are reviewed. We discuss the qualitative features of the magnetic phase diagram both in zero magnetic field and in field and analyze the commensurate magnetic structure and its coupling to an applied electric field. The origin of ferrolectricity is discussed based on calcula...

Remnant of stripe order.

At a phenomenological level, the superconducting phase of the cuprate high Tc phase diagram shown in Fig. 1A can be characterized as a BCS (named for three theorists: Bardeen, Cooper, and Schrieffer) superconductor with a d-wave gap. However, a suitable phenomenological description of the so-called “pseudogap” region indicated by the yellow shaded region in Fig. 1A has been missing. This region...

Neutron Diffraction Experiments

This ISEN award supported research toward improving the energy efficiency of actuators. The focused research objective was to develop next-generation shape memory alloy (SMA) models and structures, to demonstrate this new technology in targeted near-term applications on airplanes. Two research avenues were pursued to enable development of this new technology: 1) neutron diffraction experiments ...

Biological Neutron Diffraction

Ellipsometric and neutron diffraction study of pentane physisorbed on graphite.

High-resolution ellipsometry and neutron diffraction measurements have been used to investigate the structure, growth, and wetting behavior of fluid pentane (n-C(5)H(12)) films adsorbed on graphite substrates. We present isotherms of the thickness of pentane films adsorbed on the basal-plane surfaces of a pyrolytic graphite substrate as a function of the vapor pressure. These isotherms are meas...