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Crystal field and microwave absorption spectra in tetragonal HoBa.sub.2./sub.Cu.sub.3./sub.O.sub.x./sub.(x = 6.0, 6.3)
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SYSNO ASEP 0351332 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Crystal field and microwave absorption spectra in tetragonal HoBa2Cu3Ox(x = 6.0, 6.3) Tvůrce(i) Kazei, Z.A. (RU)
Snegirev, V. V. (RU)
Danilova, N.P. (RU)
Goiran, M. (FR)
Nekvasil, Vladimír (FZU-D) RID, ORCID
Kozeeva, L. P. (RU)
Kameneva, M.Yu. (RU)Zdroj.dok. Physical Review. B - ISSN 1098-0121
Roč. 82, č. 13 (2010), 134444/1-134444/10Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova level splitting ; crystal field ; microwave ; layered perovskites Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP IAA100100803 GA AV ČR - Akademie věd CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000283536800005 DOI 10.1103/PhysRevB.82.134444 Anotace The microwave resonance absorption at wavelengths 871, 406, 305, and 118 μm in tetragonal layered perovskites HoBa2Cu3Ox (x ≈ 6.0, 6.3) in pulsed magnetic fields up to 40 T has been observed. This absorption is caused by the electronic transitions between low lying levels of the Ho3+ ion in the crystal field. The positions and intensities of the tetragonal symmetry allowed absorption lines for the crystal with x = 6.0 in the magnetic field oriented along the principal tetragonal axes are adequately described in terms of the available crystal field parameters. To explain the symmetry forbidden absorption lines, it is necessary to take into account the effect of the inhomogeneous orthorhombic and monoclinic components of the crystal field as well as an effective exchange field from the ordered Cu2+ subsystem at the Ho3+ sites. The origin of the local deviations from the ideal tetragonal symmetry are ascribed to disorder in the oxygen subsystem. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2011
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