Field-induced spin reorientation transition in Ca$_2$Ru$_{1-x}$Fe$_x$O$_4$
ORAL
Abstract
Ca$_2$RuO$_4$ serves as a promising arena for exploring Mott physics. The persistent controversies regarding the nature of its magnetic ground state stem from the uncertain effect of the spin-orbit coupling. Two similar magnetic orders, A-centered and B-centered, were found to compete in Ca$_2$RuO$_4$ and its derivative compounds. This neuron scattering investigation on Ca$_2$Ru$_{1-x}$Fe$_x$O$_4$ (x=0.02, 0.05 and 0.08) reveals that the magnetic field, when applied in the right direction, has strong effect on tipping the balance between the two magnetic orders, evidencing the subtle canting of the Ru$^{3+}$ spins, the existence of antisymmetric exchange and the role of spin-orbit coupling.
* This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, and was supported in partby the US Department of Energy, Office of Science, Office of Basic Energy Sciences. G.C. acknowledges support by the National Science Foundation via grant DMR-1903888.
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Presenters
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Songxue Chi
Oak Ridge National Laboratory
Authors
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Songxue Chi
Oak Ridge National Laboratory
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Gang Cao
University of Colorado Boulder
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Feng Ye
Oak Ridge National Laboratory