Spectra and relaxation of electronic excitations in CsCdBr3:Yb3+ and CsCdBr3:Nd3+ monocrystals

M R Gafurov; A I Iskhakova; I N Kurkin; S P Kurzin; Boris Z. Malkin; Sergey I. Nikitin; S. B. Orlinskii; R. M. Rakhmatullin; Gil'man S. Shakurov; Valery F. Tarasov; R. Demirbilek; J. Heber

doi:10.1117/12.475344

12 July 2002 Spectra and relaxation of electronic excitations in CsCdBr₃:Yb³+ and CsCdBr₃:Nd³+ monocrystals

M R Gafurov, A I Iskhakova, I N Kurkin, S P Kurzin, Boris Z. Malkin, Sergey I. Nikitin, S. B. Orlinskii, R. M. Rakhmatullin, Gil'man S. Shakurov, Valery F. Tarasov, R. Demirbilek, J. Heber

Author Affiliations +

Proceedings Volume 4766, XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions; (2002) https://doi.org/10.1117/12.475344
Event: XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions, 2001, Kazan, Russian Federation

Abstract

Experimental and theoretical studies of the optical and EPR spectra, and the spin-lattice relaxation in CsCdBr₃ crystals containing 0.1, 0.3 and 1.0 mol. Percent of impurity Yb³⁺ ions have been fulfilled. In the optical excitation spectrum, a broad charge transfer band has been detected in the wave-number range of 25000-35000 cm^-1. The hybridization of the excited electron configuration corresponding to the charge transfer from the ligand (Br) 4p closed shells on the ground 4f¹³ configuration of the ytterbium ion is considered to interpret the anomalously large crystal field splitting of het ²F_5/2 multiplet. The EPR spectra with comparable intensities of the axial single-ion and symmetric dimer centers in the sample containing 0.3 mol percent of impurity Yb³⁺ ions were observed. Spin-lattice relaxation rates and linewidth sin the EPR spectra of the single-ion and dimer centers were measured in the temperature range of 1.5-35 K at the frequency of 9.5 GHz at different directions of the applied magnetic field relative to the crystal symmetry axis. Experimental results are analyzed in the framework of the microscopic theory of the electron-phonon interaction with taking into account peculiarities of the phonon spectrum of the impurity CsCdBr₃ lattice. High- frequency EPR spectra of dimer centers in CsCdBr₃ crystals containing 0.2 and 0.5 mol. Percent of impurity Nd³⁺ ions were taken in the range of 205-250 GHz at 4.2 K in the magnetic field sup to 0.8 T parallel to the crystal symmetry axis. The crystal field splitting between the first excited and the ground Kramers doublets, and magnetic splitting factors of these doublets were determined. AN estimate of the isotopic ferromagnetic exchange constant A equals (2.3 +/- 0.3) 10^-3 cm^-1 in symmetric dimer centers formed by impurity Nd³⁺ ions was obtained from the zero-field splitting of the EPR signals.

Citation Download Citation

M R Gafurov, A I Iskhakova, I N Kurkin, S P Kurzin, Boris Z. Malkin, Sergey I. Nikitin, S. B. Orlinskii, R. M. Rakhmatullin, Gil'man S. Shakurov, Valery F. Tarasov, R. Demirbilek, and J. Heber "Spectra and relaxation of electronic excitations in CsCdBr₃:Yb³+ and CsCdBr₃:Nd³+ monocrystals", Proc. SPIE 4766, XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions, (12 July 2002); https://doi.org/10.1117/12.475344

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available