Terahertz spectroscopy of spin excitations in magnetoelectric LiFePO4 in high magnetic fields

Autor: L. Peedu, V. Kocsis, D. Szaller, B. Forrai, S. Bordács, I. Kézsmárki, J. Viirok, U. Nagel, B. Bernáth, D. L. Kamenskyi, A. Miyata, O. Portugall, Y. Tokunaga, Y. Tokura, Y. Taguchi, T. Rõõm

Publikováno v: Physical Review B, 106, 1-12
Physical Review B
Physical Review B, 2022, 106 (13), pp.134413. ⟨10.1103/PhysRevB.106.134413⟩
Physical Review B, 106, 13, pp. 1-12

We investigated the spin excitations of magnetoelectric LiFePO4 by THz absorption spectroscopy in magnetic fields up to 33 T. By studying their selection rules, we found not only magnetic-dipole, but also electric-dipole active (electromagnons) and m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50cb49a0cf999b0e150288624035bf04
http://hdl.handle.net/2066/283891

In Situ Electric-Field Control of THz Nonreciprocal Directional Dichroism in the Multiferroic Ba_{2}CoGe_{2}O_{7}

Autor: J, Vít, J, Viirok, L, Peedu, T, Rõõm, U, Nagel, V, Kocsis, Y, Tokunaga, Y, Taguchi, Y, Tokura, I, Kézsmárki, P, Balla, K, Penc, J, Romhányi, S, Bordács

Publikováno v: Physical review letters. 127(15)

Nonreciprocal directional dichroism, also called the optical-diode effect, is an appealing functional property inherent to the large class of noncentrosymmetric magnets. However, the in situ electric control of this phenomenon is challenging as it re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::11ce35e819a60d93ff4a64c647cff8a8
https://pubmed.ncbi.nlm.nih.gov/34678006

Magnetic anisotropy and exchange paths for octahedrally and tetrahedrally coordinated Mn2+ ions in the honeycomb multiferroic Mn2Mo3O8

Autor: István Kézsmárki, Alexander A. Tsirlin, J. Viirok, D. Szaller, Toomas Rõõm, K. Szász, Vladimir Tsurkan, L. Prodan, L. Weymann, Sándor Bordács, Anton Jesche, Alexey Shuvaev, A. Pimenov, Urmas Nagel

Publikováno v: Physical Review B. 102

Magnetization, magnetic torque, and terahertz absorption spectroscopy measurements reveal various magnetic phases in the polar ferrimagnet Mn${}_{2}$Mo${}_{3}$O${}_{8}$. The metamagnetic transitions as well as the spin-wave resonances in the center a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5e7528cb10427f2c8b1020611624cd9d
https://doi.org/10.1103/physrevb.102.144410

The Magnetoelastic Distortion of Multiferroic BiFeO$_3$ in the Canted Antiferromagnetic State

Autor: Vilmos Kocsis, D. Kamenskyi, István Kézsmárki, Yasuhide Tomioka, Dmitry Smirnov, Toshimitsu Ito, D. Szaller, Trinanjan Datta, J. Krzystek, Hans Engelkamp, Komalavalli Thirunavukkuarasu, L. Peedu, Toomas Rõõm, Y. Ozaki, J. Viirok, D. G. Farkas, Randy Scott Fishman, Sándor Bordács, Urmas Nagel, Mykhaylo Ozerov

Publikováno v: Physical Review B, 102, 21, pp. 1-8
Physical Review B, 102, 1-8

Using THz spectroscopy, we show that the spin-wave spectrum of multiferroic BiFeO$_3$ in its high-field canted antiferromagnetic state is well described by a spin model that violates rhombohedral symmetry. We demonstrate that the monoclinic distortio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb64d44bb960d2c61e0e87171c147543

Directional dichroism in the paramagnetic state of multiferroics: A case study of infrared light absorption in Sr2CoSi2O7 at high temperatures

Autor: Vilmos Kocsis, J. Viirok, Yasujiro Taguchi, István Kézsmárki, Yusuke Tokunaga, Karlo Penc, Y. Tokura, D. Kamenskyi, B. Bernáth, D. G. Farkas, Sándor Bordács, P. Balla, Toomas Rõõm, D. Szaller, Urmas Nagel

Publikováno v: Physical Review B. 99

The coexisting magnetic and ferroelectric orders in multiferroic materials give rise to a handful of novel magnetoelectric phenomena, such as the absorption difference for the opposite propagation directions of light called the nonreciprocal directio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb5cf201a96dfd536418bb83f2bfc466
https://doi.org/10.1103/physrevb.99.014410