Temperature-dependent Raman spectra of $\mathrm{Ho}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ and $\mathrm{Tb}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$

Temperature-dependent Raman spectra of $Ho {Mn}_{2} O_{5}$ and $Tb {Mn}_{2} O_{5}$

B. Mihailova, M. M. Gospodinov, B. Güttler, F. Yen, A. P. Litvinchuk, and M. N. Iliev

Phys. Rev. B 71, 172301 – Published 2 May 2005

Abstract

The polarized Raman spectra of $Ho {Mn}_{2} O_{5}$ and $Tb {Mn}_{2} O_{5}$ are reported and discussed. Most of the Raman lines corresponding to $Γ$ -point Raman modes $(13 A_{g} + 13 B_{1 g} + 11 B_{2 g} + 11 B_{3 g})$ have been observed. The temperature dependence of the $Ho {Mn}_{2} O_{5}$ spectra provides no evidence for phonon anomalies associated with magnetic and ferroelectric transitions below $50 K$ .

Received 1 November 2004

DOI:https://doi.org/10.1103/PhysRevB.71.172301

Authors & Affiliations

B. Mihailova¹, M. M. Gospodinov², B. Güttler³, F. Yen⁴, A. P. Litvinchuk⁴, and M. N. Iliev⁴

¹Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
²Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
³Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
⁴Texas Center for Superconductivity and Advanced Materials, and Department of Physics, University of Houston, Houston, Texas 77204-5002, USA

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Vol. 71, Iss. 17 — 1 May 2005

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Physical Review B

covering condensed matter and materials physics

Temperature-dependent Raman spectra of $Ho {Mn}_{2} O_{5}$ and $Tb {Mn}_{2} O_{5}$

B. Mihailova, M. M. Gospodinov, B. Güttler, F. Yen, A. P. Litvinchuk, and M. N. Iliev

Phys. Rev. B 71, 172301 – Published 2 May 2005

Abstract

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Physical Review B

covering condensed matter and materials physics

Temperature-dependent Raman spectra of HoMn2O5 and TbMn2O5

B. Mihailova, M. M. Gospodinov, B. Güttler, F. Yen, A. P. Litvinchuk, and M. N. Iliev

Phys. Rev. B 71, 172301 – Published 2 May 2005

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Temperature-dependent Raman spectra of $Ho {Mn}_{2} O_{5}$ and $Tb {Mn}_{2} O_{5}$