Low-energy spin dynamics of orthoferrites AFeO$_3$ (A = Y, La, Bi)
Kisoo Park, Hasung Sim, Jonathan C. Leiner, Yoshiyuki Yoshida, Jaehong Jeong, Shin-ichiro Yano, Jason Gardner, Philippe Bourges, Milan Klicpera, Vladimír Sechov… 展开作者
Kisoo Park, Hasung Sim, Jonathan C. Leiner, Yoshiyuki Yoshida, Jaehong Jeong, Shin-ichiro Yano, Jason Gardner, Philippe Bourges, Milan Klicpera, Vladimír Sechovský, Martin Boehm, Je-Geun Park
YFeO$_3$ and LaFeO$_3$ are members of the rare-earth orthoferrites family with \textit{Pbnm} space group. Using inelastic neutron scattering, the low-energy spin excitations have been measured around magnetic Brillouin zone center. Splitting of magnon branches and non-zero magnon gap is observed for both compounds, which is similar to the behavior observed in multiferroic BiFeO$_3$. Spin wave calculations which include both Dzyaloshinsky-Moriya interactions and single-ion anisotropy in the spin-Hamiltonian comprehensively accounts for all the experimentally observed features. Our results offer insight into the unifying physics underlying the Fe$^{3+}$-based perovskites as well as their distinguishing characteristics.
Magnetic excitation spectrum and hierarchy of magnetic interactions in ErFeO3
Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum, Forschungszentrum Jülich GmbH（于利希中子科学中心）；Institute of Crystallography, RWTH Aachen University（亚琛工业大学晶体学研究所）；ISIS Facility, Rutherford Appleton Laboratory（鲁瑟福阿普尔顿实验室ISIS设施）；University of Johannesburg（约翰内斯堡大学）
