Polarized Triple-Axis Spectrometer
PTAX | HB-1 | HFIR
The HB-1 triple axis spectrometer is an excellent instrument for polarization analyses on magnetic structures and magnetic excitations in solids. This instrument is most beneficial to the condensed matter and materials science communities. Due to its versatility and easy access this instrument can be used for parametric studies using a variety of ancillary sample environments to provide a complete control of thermodynamic variables such as temperature, magnetic field, electric field, and pressure. During the last few years most of the demand for this instrument has been focused on studies of unconventional superconductors, quantum magnets, thermoelectrics, and multiferroics.
Examples of typical experiments carried out at HB-1 are listed below:
- Half polarization - ferromagnetism
"Magnetic structure of Fe16N2 determined by polarized neutron diffraction on thin-film samples", Physical Review B, 102, 104402 (2020).
"Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4P12 caused by p-f hybridization", Physical Review B, 102, 214444 (2020). - Half polarization - chirality
"Unique Helical Magnetic Order and Field-Induced Phase in Trillium Lattice Antiferromagnet EuPtSi", Journal of the Physical Society of Japan, 88, 013702 (2019).
"Electric-Field Manipulation of Magnetic Chirality in a Homo-Ferro-Rotational Helimagnet", Advanced Science, 11, 2402048 (2024). - Longitudinal polarization
"Polarized neutron scattering study of the multiple order parameter system NdB 4", Physical Review B, 97, 17, 174416 (2018).
"Dual Nature of Magnetism in a Uranium Heavy-Fermion System", Physical Review Letters, 121, 5, 057201 (2018). - Larmor diffraction
"New capabilities in high-resolution neutron Larmor diffraction at ORNL", Journal of Applied Crystallography, 51, 3, 1-7 (2018)
"Symmetry Breaking and Ascending in the Magnetic Kagome Metal FeGe", Physical Review X, 14, 1, 011043 (2024). - Inelastic neutron spin echo
"High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique", Journal of Applied Crystallography, 52, 755-760 (2019).
"Temperature-dependent phonon linewidths and shifts in bismuth from inelastic neutron scattering", Physical Review Materials, 9, 125403 (2025). - Spherical neutron polarimetry
"Development of a portable high-Tc spherical neutron polarimetry device at the Oak Ridge National Laboratory", Scientific Reports, 15, 17194 (2025).
CONNECT WITH US
Oak Ridge National Laboratory is managed by UT-Battelle LLC for the US Department of Energy