Crystal field fine spectroscopy of trivalent terbium in yttrium aluminum borate single crystals

Baraldi, A.; Buffagni, E.; Capelletti, R.; Mazzera, Margherita; Földvári, I.; Береги, Э.; Magnani, N.

doi:10.1088/1757-899x/15/1/012034

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Theory a , b that the ground state of the Tb 3+ ion in the high-temperature R32 phase is a quasi-doublet 1 + 2 , the same as in the case of the TbAl 3 (BO 3 ) 4 and YAl 3 (BO 3 ) 4 :Tb crystals [34,35]. A small σ component of line 1A comes, evidently, from the MD contribution.…”

Section: Methodsmentioning

confidence: 75%

Phase transitions and crystal-field and exchange interactions in TbFe₃(BO₃)₄as seen via optical spectroscopy

Попова

Stanislavchuk

Малкин

et al. 2012

J. Phys.: Condens. Matter

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High-resolution polarized broadband (1800-23 000 cm(-1)) optical absorption spectra of Tb(3+) in TbFe(3)(BO(3))(4) single crystals are studied between room temperature and 4.2 K. The spectral signatures of the structural (R32-P3(1)21, T(S ) = 192 K) and magnetic (T(N ) = 41 K) phase transitions are found and analyzed. Energies and symmetries of the Tb(3+) crystal-field (CF) levels were determined for both the high-temperature R32 and the low-temperature P3(1)21 structures of TbFe(3)(BO(3))(4) and compared with the calculated ones. It follows unambiguously from the spectral data that the ground state is the Γ(1) + Γ(2) quasi-doublet of the local D(3) point symmetry group for Tb(3+) in the R32 high-temperature structure. The CF calculations revealed the CF parameters and wavefunctions for Tb(3+) in TbFe(3)(BO(3))(4). The value of the Tb-Fe exchange integral and of the effective magnetic field created by the ordered Fe subsystem were estimated as J(fd) = 0.26 K and B(eff) = 3.92 T, using the observed splitting Δ = 32 cm(-1) of the Tb(3+) ground quasi-doublet at the temperature 5 K. The reliability of the obtained parameters was proven by modeling the literature data on the magnetic susceptibility of TbFe(3)(BO(3))(4). Lattice distortions below T(S) were evidenced by the observed changes of probabilities of the forced electric dipole transitions of Tb(3+).

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Section: Methodsmentioning

confidence: 75%

Phase transitions and crystal-field and exchange interactions in TbFe₃(BO₃)₄as seen via optical spectroscopy

Попова

Stanislavchuk

Малкин

et al. 2012

J. Phys.: Condens. Matter

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High resolution spectroscopy to investigate impurity traces in YAB single crystals

Mazzera

Baraldi

Buffagni³

et al. 2011

Cryst. Res. Technol.

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The work explores the feasibility of high resolution (as fine as 0.02 cm -1 ) Fourier transform spectroscopy applied at 9 K in the 500-25000 cm -1 range to detect traces of unwanted impurities, mainly rare earths (RE 3+ ) in crystals: the system chosen is YAl 3 (BO 3 ) 4 (YAB). Weak traces of RE 3+ (Nd, Dy, Er, Tm, Yb), but also of Cr 3+ and OH -, were successfully monitored by comparing the spectra of YAB samples under examination with those intentionally doped with a given ion. The analysis performed on a variety of samples shows how Cr 3+, Nd 3+, and Yb 3+ are the most frequent unwanted dopants and can provide suggestions to the crystal growers about the performances of different crystal growth lines. According to a preliminary evaluation, the Er 3+ traces detection limit is as low as 1-2×10 -4 mol% in 1 cm thick samples. The advantages of the method, which is sample non-destructive, are discussed in comparison with those currently applied.

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Spectroscopic analysis of Pr3+ crystal-field transitions in YAl3(BO3)4

Mazzera

Baraldi

Buffagni³

et al. 2011

Appl. Phys. B

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Crystal field fine spectroscopy of trivalent terbium in yttrium aluminum borate single crystals

Abstract: have been analyzed and fitted within a single ion Hamiltonian model, to obtain free-ion and crystal-field parameters. The electron-phonon interaction has been put into evidence by thermally induced line shift and discussed in the framework of a single phonon coupling model.

Cited by 3 publications

References 15 publications

Phase transitions and crystal-field and exchange interactions in TbFe₃(BO₃)₄as seen via optical spectroscopy

Phase transitions and crystal-field and exchange interactions in TbFe₃(BO₃)₄as seen via optical spectroscopy

High resolution spectroscopy to investigate impurity traces in YAB single crystals

Spectroscopic analysis of Pr3+ crystal-field transitions in YAl3(BO3)4

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Crystal field fine spectroscopy of trivalent terbium in yttrium aluminum borate single crystals

Abstract: have been analyzed and fitted within a single ion Hamiltonian model, to obtain free-ion and crystal-field parameters. The electron-phonon interaction has been put into evidence by thermally induced line shift and discussed in the framework of a single phonon coupling model.

Cited by 3 publications

References 15 publications

Phase transitions and crystal-field and exchange interactions in TbFe3(BO3)4as seen via optical spectroscopy

Phase transitions and crystal-field and exchange interactions in TbFe3(BO3)4as seen via optical spectroscopy

High resolution spectroscopy to investigate impurity traces in YAB single crystals

Spectroscopic analysis of Pr3+ crystal-field transitions in YAl3(BO3)4

Contact Info

Product

Resources

About

Phase transitions and crystal-field and exchange interactions in TbFe₃(BO₃)₄as seen via optical spectroscopy

Phase transitions and crystal-field and exchange interactions in TbFe₃(BO₃)₄as seen via optical spectroscopy