Localized spin-flip excitations in hexagonal HoMnO3

Ji Yeon Nam; Seung Kim; Hien Thi Minh Nguyen; Xiang Bai Chen; Mahn Soo Choi; Daesu Lee; T. W. Noh; In Sang Yang

doi:10.1002/jrs.5969

Localized spin-flip excitations in hexagonal HoMnO₃

Ji Yeon Nam, Seung Kim, Hien Thi Minh Nguyen, Xiang Bai Chen, Mahn Soo Choi, Daesu Lee, T. W. Noh, In Sang Yang

Department of Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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 (HoMn_{1 − x}Ga_xO₃). 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.

Original language	English
Pages (from-to)	2298-2304
Number of pages	7
Journal	Journal of Raman Spectroscopy
Volume	51
Issue number	11
DOIs	https://doi.org/10.1002/jrs.5969
State	Published - Nov 2020

Bibliographical note

Funding Information:
I. ‐S. Y. acknowledges the financial support by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Grant No. 2017R1A2B2009309). N. T. M. H. was supported by the fund of Graduate University of Science and Technology under grant number GUST.STS.ĐT2017‐VL02. X. ‐B. C. was funded by the National Natural Science Foundation of China (Grant No. 11574241). M. ‐S. C. was supported by the National Research Foundation of Korea (Grant Nos. 2017R1E1A1A03070681 and 2018R1A4A1024157). D. L. and T. W. N. were supported by the Research Center Program of the Institute for Basic Science (IBS) in Korea (Grant No. IBS‐R009‐D1).

Publisher Copyright:
© 2020 John Wiley & Sons, Ltd.

Keywords

hexagonal HoMnO
multiferroics
resonance Raman spectroscopy
spin-flip excitations
spin-frustrated triangular network

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10.1002/jrs.5969

Cite this

@article{4e28fe592c1841f18c5b27e326ed7c5d,

title = "Localized spin-flip excitations in hexagonal HoMnO3",

abstract = "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.",

keywords = "hexagonal HoMnO, multiferroics, resonance Raman spectroscopy, spin-flip excitations, spin-frustrated triangular network",

author = "Nam, {Ji Yeon} and Seung Kim and Nguyen, {Hien Thi Minh} and Chen, {Xiang Bai} and Choi, {Mahn Soo} and Daesu Lee and Noh, {T. W.} and Yang, {In Sang}",

note = "Funding Information: I. ‐S. Y. acknowledges the financial support by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Grant No. 2017R1A2B2009309). N. T. M. H. was supported by the fund of Graduate University of Science and Technology under grant number GUST.STS.{\D}T2017‐VL02. X. ‐B. C. was funded by the National Natural Science Foundation of China (Grant No. 11574241). M. ‐S. C. was supported by the National Research Foundation of Korea (Grant Nos. 2017R1E1A1A03070681 and 2018R1A4A1024157). D. L. and T. W. N. were supported by the Research Center Program of the Institute for Basic Science (IBS) in Korea (Grant No. IBS‐R009‐D1). Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons, Ltd.",

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T1 - Localized spin-flip excitations in hexagonal HoMnO3

AU - Nam, Ji Yeon

AU - Kim, Seung

AU - Nguyen, Hien Thi Minh

AU - Chen, Xiang Bai

AU - Choi, Mahn Soo

AU - Lee, Daesu

AU - Noh, T. W.

AU - Yang, In Sang

N1 - Funding Information: I. ‐S. Y. acknowledges the financial support by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Grant No. 2017R1A2B2009309). N. T. M. H. was supported by the fund of Graduate University of Science and Technology under grant number GUST.STS.ĐT2017‐VL02. X. ‐B. C. was funded by the National Natural Science Foundation of China (Grant No. 11574241). M. ‐S. C. was supported by the National Research Foundation of Korea (Grant Nos. 2017R1E1A1A03070681 and 2018R1A4A1024157). D. L. and T. W. N. were supported by the Research Center Program of the Institute for Basic Science (IBS) in Korea (Grant No. IBS‐R009‐D1). Publisher Copyright: © 2020 John Wiley & Sons, Ltd.

PY - 2020/11

Y1 - 2020/11

N2 - 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.

AB - 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.

KW - hexagonal HoMnO

KW - multiferroics

KW - resonance Raman spectroscopy

KW - spin-flip excitations

KW - spin-frustrated triangular network

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