Phonons in isostructural (ND,Yb):Y{sub x}Gd{sub 1-x}(VO{sub 4}) laser crystals: A Raman scattering study

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.02.018· OSTI ID:21504062

Zhang, Nana ^[1]; Wang, Jiyang ^[1]; Hu, Xiaobo; Zhang, Huaijin ^[1]; Santos, C C ^[2]; Ayala, A P ^[3]; Guedes, I ^[3]

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1. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China)
2. Departamento de Fisica, CCET, Universidade Federal do Maranhao, 65085-580 Sao Luis, MA (Brazil)
3. Departamento de Fisica, Universidade Federal do Ceara, Campus do Pici, CP 6030, Fortaleza CE 60455-760 (Brazil)

The room temperature phonon modes of the isostructural (Nd,Yb):Y{sub x}Gd{sub 1-x}(VO{sub 4}) laser crystals were determined using the Raman scattering technique, and the observed wavenumbers follow the overall mode distribution expected for REVO{sub 4} (RE=rare earth) compounds with the tetragonal zircon structure, D{sub 4h}{sup 19}. They were assigned according to the group theory in terms of the internal modes of the VO{sub 4} tetrahedron and the external modes of the Y{sub x}Gd{sub 1-x}(VO{sub 4}) lattice. No appreciable changes in the phonon wavenumbers were observed for Yb:GdVO{sub 4} (Yb=0.008, 0.015, 0.020, 0.025, and 0.035), indicating that the force fields in the GdVO{sub 4} lattice are not strongly altered by Yb doping at the Gd site. However, most of the phonon wavenumbers in the systems (Nd,Yb):Y{sub x}Gd{sub 1-x}(VO{sub 4}) shifts upwards (one-phonon-like behavior) when Y replaces for Gd. -- Graphical abstract: Plot of the observed wavenumbers of Nd:Y{sub x}Gd{sub 1-x}(VO{sub 4}) versus Y content (x). The linear trend indicates that most of the observed wavenumbers exhibit a one-phonon-like behavior. Display Omitted Research highlights: > Force fields in the GdVO{sub 4} lattice are not strongly altered by Yb doping at the Gd site when the doping content of Yb is below 3.5 at%. > Most of the phonon wavenumbers in the systems (Nd,Yb):Y{sub x}Gd{sub 1-x}(VO{sub 4}) shifts upwards with x increasing. > The upward shifting is related to the decrease of the RE-O distance due to the lattice contraction. > Most of the observed wavenumbers exhibits a one-phonon-like behavior.

• OSTI ID: 21504062
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 4; Other Information: DOI: 10.1016/j.jssc.2011.02.018; PII: S0022-4596(11)00072-7; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CRYSTALS
GADOLINIUM COMPOUNDS
GROUP THEORY
NEODYMIUM COMPOUNDS
PHONONS
RAMAN EFFECT
RAMAN SPECTRA
TEMPERATURE RANGE 0273-0400 K
VANADATES
YTTERBIUM COMPOUNDS
YTTRIUM COMPOUNDS
MATHEMATICS
OXYGEN COMPOUNDS
QUASI PARTICLES
RARE EARTH COMPOUNDS
SPECTRA
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS