Electromagnon with Sensitive Terahertz Magnetochromism in a Room-Temperature Magnetoelectric Hexaferrite
- Seoul National Univ. (Korea, Republic of). CeNSCMR, Dept. of Physics and Astronomy
- Pohang Accelerator Lab., Pohang (South Korea)
- Seoul National Univ. (Korea, Republic of). Dept. of Physics and Astronomy, Nano Optics Group
- Seoul National Univ. (Korea, Republic of). Center for THz-Bio Application systems, Dept. of Physics and Astronomy
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
An electromagnon in the magnetoelectric (ME) hexaferrite Ba0.5Sr2.5Co2Fe24O41 (Co2 Z-type) single cystal is identified by time-domain terahertz (THz) spectroscopy. The associated THz resonance is active on the electric field (Eω) of the THz light parallel to the c axis (∥ [001]), whose spectral weight develops at a markedly high temperature, coinciding with a transverse conical magnetic order below 410 K. The resonance frequency of 1.03 THz at 20 K changes -8.7% and +5.8% under external magnetic field (H) of 2 kOe along [001] and [120], respectively. A model Hamiltonian describing the conical magnetic order elucidates that the dynamical ME effect arises from antiphase motion of spins which are coupled with modulating electric dipoles through the exchange striction mechanism. Moreover, the calculated frequency shift points to the key role of the Dzyaloshinskii-Moriya interaction that is altered by static electric polarization change under different H.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Research Foundation of Korea (NRF)
- Contributing Organization:
- Magnetoelectric effect; Multiferroics
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1425289
- Alternate ID(s):
- OSTI ID: 1416836
- Journal Information:
- Physical Review Letters, Vol. 120, Issue 2; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Multifunctional Hybrid Metasurfaces for Dynamic Tuning of Terahertz Waves
|
journal | May 2018 |
Vibrational spectra of multiferroics with Y- and Z-type hexaferrite structures
|
journal | August 2018 |
Electromagnon Resonance at Room Temperature with Gigantic Magnetochromism
|
journal | April 2018 |
Similar Records
Giant magnetoresistance due to magnetoelectric currents in Sr{sub 3}Co{sub 2}Fe{sub 24}O{sub 41} hexaferrites
First observation of magnetoelectric effect in M-type hexaferrite thin films