Localized spin-flip excitations in hexagonal HoMnO3
- 주제(키워드) hexagonal HoMnO3 , multiferroics , resonance Raman spectroscopy , spin-flip excitations , spin-frustrated triangular network
- 등재 SCIE, SCOPUS
- 발행기관 John Wiley and Sons Ltd
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000174887
- 본문언어 영어
- Published As http://dx.doi.org/10.1002/jrs.5969
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Growing demands for ultra-fast switching of spins have turned attention to optically controlled spintronics, which indeed has recently been demonstrated promising. Here we report localized spin-flip excitations revealed by resonance inelastic light scattering on hexagonal holmium manganite thin films with the magnetic manganese ions substituted by the nonmagnetic gallium ions (HoMn1 − xGaxO3). Our analyses on a broad Raman peak support that the corresponding spin excitation is associated with flipping of all three Mn3+ spins in the elementary trimer of manganese ions and hence maintains the same excitation energy determined by the intrinsic spin–spin interaction between Mn3+ ions. The nonmagnetic gallium ions only reduce the population of the spin excitations by breaking the spin-frustrated triangular network. Such localized spin-flip excitations show another promise towards optically controlled spin devices. © 2020 John Wiley & Sons, Ltd.
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