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arXiv · 1705.09441

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 Sechovský·Martin Boehm·Je-Geun Park
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Abstract

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.

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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. 2017-05-26. Low-energy spin dynamics of orthoferrites AFeO$_3$ (A = Y, La, Bi). https://doi.org/10.1088/1361-648x/aac06b

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