Electronic and phonon processes of MnO
            <sub>4</sub>
            – molecular impurities in alkali halide crystals

Maksimova, T. I.; Hermanovich, K.; Hanuza, J.; Happek, U.

doi:10.1002/pssc.200460175

phys. stat. sol. (c)

2005

DOI: 10.1002/pssc.200460175

|View full text |Cite

Electronic and phonon processes of MnO ₄ – molecular impurities in alkali halide crystals

T. I. Maksimova

K. Hermanovich

J. Hanuza

et al.

Abstract: We present the results of a detailed study of the near-infrared photoluminescence and the luminescence excitation spectra of iodide (KI and RbI) and bromide (KBr and RbBr) crystals doped with MnO

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2006

2007

Publication Types

Select...

Article2

Relationship

Self Cite1

Independent1

Authors

Journals

Cited by 2 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The MnO 4 -molecular ions attract a special attention seeing that they are the advantaged paramagnetic and optical probes for the study of intrinsic fields in crystals. It was shown with EPR [7] and optical spectroscopic studies [8][9][10] that the MnO 4 2impurity ions incorporated in various insulating materials have a potential as the perspective new laser systems in the near-infrared region.…”

mentioning

confidence: 99%

EPR and optical spectroscopy of MnO₄^2– doped proper ferroelastic K₃Na(CrO₄)₂: local transition and Jahn‐Teller effect

Maksimova¹,

Vikhnin²,

Asatryan³

et al. 2007

Phys. Status Solidi (c)

Self Cite

View full text Add to dashboard Cite

We report the study of the polarized optical absorption, the near-infrared luminescence and the luminescence excitation spectra of the proper ferroelastic K 3 Na(CrO 4 ) 2 crystals doped with MnO 4 2-ions. It is obtained from the luminescence and the d-d absorption spectra that the 3d 1 electronic ground ( 2 E) and excited ( 2 T 2 ) states of MnO 4 2-are split by the monoclinic crystal field of the host lattice at T < 230 K. The well-resolved vibronic progressions in the luminescence spectra are ascribed to a strong coupling with a MnO 4 2-bending ν 2 = 335 cm -1 mode. The spectral dependence of the linear polarization degree ρ(ω) of the charge-tranfer absorption for E||c and E||b polarization reveals a clear periodic structure due to interaction of local electronic states with a ν 1 = 816 cm −1 local mode. The first EPR spectrum of the Mn 6+ paramagnetic center in the K 3 Na(CrO 4 ) 2 : MnO 4 2-crystal is studied. The local transition due to a local configuration instability of vibronic origin at low temperature T ≤ 18 K is detected and identified. 1 Introduction The proper ferroelastic K 3 Na(CrO 4 ) 2 crystals are the objects of intense interest, and a number of experimental and theoretical studies have been carried out [1][2][3][4][5]. In most cases these reports using X-ray diffraction [1], EPR -and spectroscopic techniques [2,5] were aimed to the investigation of the properties of the unusual phase transformation of this material. According to [4,5] the phase transition in this crystal is a weak first-order one and occurs from 3m1 point group to 2/m at T c = 239K. The ferroelastic K 3 Na(CrO 4 ) 2 crystals containing the molecular impurities were not studied up to recent time [6]. The MnO 4 -molecular ions attract a special attention seeing that they are the advantaged paramagnetic and optical probes for the study of intrinsic fields in crystals. It was shown with EPR [7] and optical spectroscopic studies [8][9][10] that the MnO 4 2-impurity ions incorporated in various insulating materials have a potential as the perspective new laser systems in the near-infrared region.We present an experimental and theoretical study of the polarized optical absorption, near-infrared luminescence (NIRL) and luminescence excitation (LE) spectra of the K 3 Na(CrO 4 ) 2 crystals doped with the MnO 4 2-ions. The well-defined vibronic progressions in the NIRL spectrum are observed and ascribed to a strong electron coupling with the bending ν 2 mode of the MnO 4 2-ions. From comparison of the luminescence and the d-d absorption spectra the NIRL spectrum was assigned to d-d ( 2 T 2 -2 E) ligand field (LF) optical transition of MnO 4 2-. The electronic ground ( 2 E) and excited ( 2 T 2 ) states of MnO 4 2-are shown to be split in the low temperature (ferroelastic) crystal phase. The electron paramagnetic resonance (EPR) spectra for the MnO 4 2-impurity ions in the K 3 Na(CrO 4 ) 2 :MnO 4 2-crystals directly confirm that the active paramagnetic centre related to the MnO 4 2-molecular ion is Mn 6+ ion. A drastic spectrum intensity ...

show abstract

mentioning

confidence: 99%

EPR and optical spectroscopy of MnO₄^2– doped proper ferroelastic K₃Na(CrO₄)₂: local transition and Jahn‐Teller effect

Maksimova¹,

Vikhnin²,

Asatryan³

et al. 2007

Phys. Status Solidi (c)

Self Cite

View full text Add to dashboard Cite

show abstract

Electron paramagnetic resonance and optical spectroscopy of K3Na(CrO4)2 ferroelastics activated by MnO 4 2− molecular impurity ions

et al. 2006

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Electronic and phonon processes of MnO ₄ – molecular impurities in alkali halide crystals

Abstract: We present the results of a detailed study of the near-infrared photoluminescence and the luminescence excitation spectra of iodide (KI and RbI) and bromide (KBr and RbBr) crystals doped with MnO

Cited by 2 publications

References 8 publications

EPR and optical spectroscopy of MnO₄^2– doped proper ferroelastic K₃Na(CrO₄)₂: local transition and Jahn‐Teller effect

EPR and optical spectroscopy of MnO₄^2– doped proper ferroelastic K₃Na(CrO₄)₂: local transition and Jahn‐Teller effect

Electron paramagnetic resonance and optical spectroscopy of K3Na(CrO4)2 ferroelastics activated by MnO 4 2− molecular impurity ions

Contact Info

Product

Resources

About

Electronic and phonon processes of MnO 4 – molecular impurities in alkali halide crystals

Abstract: We present the results of a detailed study of the near-infrared photoluminescence and the luminescence excitation spectra of iodide (KI and RbI) and bromide (KBr and RbBr) crystals doped with MnO

Cited by 2 publications

References 8 publications

EPR and optical spectroscopy of MnO42– doped proper ferroelastic K3Na(CrO4)2: local transition and Jahn‐Teller effect

EPR and optical spectroscopy of MnO42– doped proper ferroelastic K3Na(CrO4)2: local transition and Jahn‐Teller effect

Electron paramagnetic resonance and optical spectroscopy of K3Na(CrO4)2 ferroelastics activated by MnO 4 2− molecular impurity ions

Contact Info

Product

Resources

About

Electronic and phonon processes of MnO ₄ – molecular impurities in alkali halide crystals

EPR and optical spectroscopy of MnO₄^2– doped proper ferroelastic K₃Na(CrO₄)₂: local transition and Jahn‐Teller effect

EPR and optical spectroscopy of MnO₄^2– doped proper ferroelastic K₃Na(CrO₄)₂: local transition and Jahn‐Teller effect