Spin Waves and Magnetic Exchange Couplings in Ferromagnetic LaCrGe3
Recent studies of LaCrGe3 illustrate a unique wing-structure phase diagram and a new magnetic phase tunable by thermodynamic parameters. While transport studies have strongly supported this phase diagram, the precise nature of transitions remains unknown. In particular, the order of the paramagnetic to ferromagnetic (FM) phase transition and the FM1 to FM2 metamagnetic phase transition needs to be clarified. To determine this, we propose an inelastic neutron scattering experiment to study the low energy spin waves and exchange coupling interactions across the phase transitions of LaCrGe3. We will map out the temperature dependence of the spin wave dispersion to determine the exchange coupling along different directions across the phase transitions. By determining the exact nature of this critical phase transition phenomena, we will help to fully explain the magnetic state of LaCrGe3 and improve the understanding of novel behavior related to quantum phase transitions.
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NEUBAUER Kelly; Bourges; IVANOV Alexandre; RAYMOND Stephane; Yixi Su and XIE Yaofeng. (2021). Spin Waves and Magnetic Exchange Couplings in Ferromagnetic LaCrGe3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-03-1737
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