HIRES 2026

Session

Magnetism

Not scheduled

ILL4

48. Exploiting polarised neutron and ultrafast X-ray pump-probe synergies to reveal the spin and heat dynamics in spin caloritronics

Dan MANNIX

Poster

Spin caloritronics are currently a science highight due to their potential exploitation in the next generation of spintronics applications. A prominent example are devices exploiting the spin Seebeck effect (SSE), where thermoelectric generation is achieved by a thermally induced spin-current, which is then converted into an electric charge current by the inverse spin Hall effect within the HM...

81. Influence of Doping and Pressure on the Magnetic Behavior of SmCrO₃

Komal KANWAR (Forschungszentrum Jülich)

Poster

The magnetic interactions between rare-earth and transition-metal moments are of significant interest in the study of permanent magnets [1-2]. In particular, the interplay between 4f and 3d magnetic moments leads to complex behaviors, giving rise to phenomena such as spin reorientation, exchange bias, multiferroicity, and spin switching [3]. Among rare-earth chromites, SmCrO₃ has been...

71. Lifetimes of spin excitations with three-axis spin-echo

Thomas KELLER (Max Planck Institute for Solid State Research)

Oral

Special care is needed for spin echo spectroscopy of spin excitations. Even in the case of antiferromagnets (AF), which do not depolarize the neutron beam, the scattering on spin excitations induces neutron spin flips that affect the spin echo signal. We review three cases from TRISP at the FRM II. The first case is a straightforward example of magnons in the uniaxial AF MnF2, where by proper...

50. Magnetic studies in a rare earth Kitaev candidate

David TAM (Institut Laue-Langevin)

Oral

We use IN5 and WASP to characterize the magnetic ground state of single crystal SmI$_3$, a 2D honeycomb magnet proposed as a possible f-electron Kitaev system. The ground state is established as a ferromagnetic correlated quantum spin liquid, however, both of these experiments identify low energy scattering at positions away from the zone center. Our work demonstrates the applicability of...

79. Real-Time Magnetic Dynamics in a Frustrated Quantum Magnet Polymorph

Fanjun XU (HZB)

Poster

Motivated by the growing effort to identify entangled quantum states in real materials, we experimentally investigate magnetic correlations across unprecedented energy and time scales in two archetypal frustrated spin-1/2 systems: a triangular-lattice antiferromagnet driven by geometric frustration, and a cubic-lattice antiferromagnet where frustration arises from quenched disorder. Both...

21. Spin Dynamics of Ba₅Ru₃O₁₂: An Inelastic Neutron Scattering and Machin Learned Force-Field Study

Ekta KUSHWAHA (Rajiv Gandhi Institute of Petroleum Technology)

Poster

We have Performed an inelastic neutron scattering (INS) investigation on the trimer ruthenate Ba$_5$Ru$_3$O$_{12}$, that undergoes long-range antiferromagnetic ordering at $T_\mathrm{N}$ = 60 K. The INS spectra suggest two distinct spin-wave excitations one at 5.6 meV, which is less intence and a broader intense excitation around 10-15 meV. Notably, these magnetic excitations persist well...

51. Spinon continuum of a triangular lattice ising candidate

Oystein FJELLVAG (institute for Energy Technology)

Oral

Rare-earth trihalides are attracting attention in the field of quantum matter for their potential to exhibit exotic ground states arising from interactions among magnetic moments, including competing interactions or geometrical frustration. While the late rare-earth halides adopt a honeycomb structure, the early rare-earth trihalides adopt a 3D UCl3-type structure, with ABAB stacked triangular...

64. The influence of dipolar interactions on the critical dynamics in nickel

Lukas BEDDRICH (Jülich Centre for Neutron Science at MLZ)

Oral

The study of critical phenomena has always been deeply connected with magnetism in solid state materials. Nickel, one of the three archetypical room temperature ferromagnets, is understood to be an itinerant system with a high degree of localization regarding its magnetically active electron states. We report a high-resolution neutron spectroscopy investigation of nickel (Ni) near its Curie...

27. Using applied magnetic fields to induce unconventional magnetic order in the frustrated quantum magnet, clinoatacamite, Cu2Cl(OH)3

Juliana AVTAROVSKI (University of Wollongong)

Poster

The natural mineral clinoatacamite, [Cu2Cl(OH)3], exhibits low-temperature, frustrated magnetic behaviour where competing interactions are responsible for novel magnetic properties. Attempts to establish the magnetic phases in this material have been undertaken and an unconventional applied field (H||b) phase diagram has been revealed [1]. Two critical transition temperatures at zero field...