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Subterahertz and terahertz spin and lattice dynamics of the insulating ferromagnet PbMnBO4 / M. A. Prosnikov, M. E. Bal, M. I. Kolkov [et al.] // Phys. Rev. Res. - 2022. - Vol. 4, Is. 1. - Ст. 013004, DOI 10.1103/PhysRevResearch.4.013004. - Cited References: 62. - M.A.P. greatly acknowledges D. A. Andronikova for aid, B. T. Crow for fruitful discussions, and P. Albers for technicalassistance. Crystal growth was supported by RFBR and the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, through Research Project No. 20-42-240006. The theoretical part of the spin dynamics calculations was supported by BASIS Foundation Grant No. 21-1-4-33-1. The support of HFML-RU/NWO-I, a member of the European Magnetic Field Laboratory (EMFL) , is acknowledged
. - ISSN 2643-1564РУБ Physics, Multidisciplinary
Рубрики:
LIGHT-SCATTERING
ANTI-STOKES
BRILLOUIN-SCATTERING
Аннотация: Orthorhombic PbMnBO4 is a rare example of an insulating ferromagnet in which the magnetic properties, in particular the strong magnetic anisotropy, are determined by the Mn3+ Jahn-Teller ion. Here, we report on the detailed investigation of magnetic excitations in the subterahertz and terahertz frequency ranges, as well as lattice excitations in the terahertz range. Using polarized azimuthally resolved Raman spectroscopy, four branches of magnetic excitations were observed and assigned to one acoustic and three optical one-magnon modes. The coupling between ferromagnetic ordering at TC=31K and the Jahn-Teller distortions of [MnO6] octahedra due to the spin-phonon interaction was directly observed for some specific phonon modes involved in these distortions. A spin-wave Hamiltonian was developed that allowed us to determine a unique set of exchange and effective anisotropy parameters. The intensity ratio of the anti-Stokes to Stokes acoustic magnon peaks is found to be anomalous and directly indicates the involvement of the magneto-optical parameters in the magnetic Raman scattering process.
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Держатели документа:
Radboud Univ Nijmegen, High Field Magnet Lab, EMFL, Toernooiveld 7, NL-6525 ED Nijmegen, Netherlands.
Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands.
Ioffe Inst, St Petersburg 194021, Russia.
Russian Acad Sci, Siberian Branch, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Доп.точки доступа:
Prosnikov, M. A.; Bal, M. E.; Kolkov, M. I.; Колков, Максим Игоревич; Pankrats, A. I.; Панкрац, Анатолий Иванович; Pisarev, R., V; Christianen, P. C. M.; RFBRRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [20-42-240006]; BASIS Foundation [21-1-4-33-1]; HFML-RU/NWO-I, a member of the European Magnetic Field Laboratory (EMFL)
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