Structural and magnetic properties of YAl3(BO3)4 and EuAl3(BO3)4 single crystals doped with Co2+

Prokhorov, A. A.; Chernush, L. F.; Minyakaev, R.; Mazur, Anton S.; Zajarniuk, T.; Szewczyk, A.; Dyakonov, V.; Lančok, J.; Prokhorov, A. D.

doi:10.1016/j.jallcom.2018.06.149

Cited by 7 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The other two spectral axes may have an arbitrary direction and do not coincide with the symmetry elements of the crystal. A similar pattern was observed in the spectrum of the Ti 3+ [21] ion and in the spectrum of the Co 2+ [24] ion in yttrium aluminum borates. Monoclinic symmetry can lead to the appearance of low symmetry effects in the EPR spectra, which are manifested in the mismatch of the transition axes corresponding to different pairs of energy levels of the paramagnetic center, in the mismatch of the axes of the g-tensor and the hyperfine splitting tensor, in the asymmetry of the angular dependence of the magnetic spectrum.…”

Section: Resultssupporting

confidence: 79%

EPR Study of Chromium Ions Doped Gallium Borate

et al. 2019

Self Cite

View full text Add to dashboard Cite

New data on the state of Cr 3+ ion impurities in a single crystal of YGa3(BO3)4 were obtained from analysis of the electron paramagnetic resonance spectra. Crystal structure, lattice parameters, and atomic position of this crystal were studied by X-ray powder diffraction method. The Cr 3+ ions are found to substitute for the trivalent gallium ions. The spectra of Cr 3+ ions located at three magnetically nonequivalent sites that rotated through 120 • are registered. The obtained parameters of spin Hamiltonian of the Cr 3+ ions in the YGa3(BO3)4 single crystal were analyzed. Crystal structure, lattice parameters, and atomic position of this crystal are studied by X-ray powder diffraction method.

show abstract

Section: Resultssupporting

confidence: 79%

EPR Study of Chromium Ions Doped Gallium Borate

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The structural characterization of YAl 3 (BO3) 4 host lattice is mainly related to X-ray diffraction [25,[35][36][37]. The main purpose of this study is to study vibrational spectra of YAB and reveal or exclude a possible portion existence of the monoclinic (C2/c) phase in trigonal (R32) YAl 3 (BO 3 ) 4 lattice.…”

Section: Introductionmentioning

confidence: 99%

Structural, Electronic and Vibrational Properties of YAl3(BO3)4

et al. 2020

View full text Add to dashboard Cite

The crystal structure of YAl3(BO3)4 is obtained by Rietveld refinement analysis in the present study. The dynamical properties are studied both theoretically and experimentally. The experimental Raman and Infrared spectra are interpreted using the results of ab initio calculations within density functional theory. The phonon band gap in the Infrared spectrum is observed in both trigonal and hypothetical monoclinic structures of YAl3(BO3)4. The electronic band structure is studied theoretically, and the value of the band gap is obtained. It was found that the YAl3(BO3)4 is an indirect band gap dielectric material.

show abstract

“…In general, the thermal quenching behavior of phosphors is closely related to the structural rigidity, electron–phonon coupling strength, band gap of the host, nonradiative process, etc. , Structural rigidity can be examined by using the Debye temperature as a proxy. The Debye temperature of YGBO is calculated to be approximately 395 K, which is similar to the Debye temperature of EuAl 3 (BO 3 ) 4 (355 K) and YAl 3 (BO 3 ) 4 (400 K), indicating good structural rigidity. , From the crystal structure data of YGBO (Table S2), it is known that the lattice distortion index ( D dis ) and the quadratic elongation of [GaO 6 ] octahedra are 0.01555 and 1.0128, respectively. Both the low D dis value and the secondary elongation close to 1 indicate that the coordination polyhedra around Ga 3+ ions are very close to regular octahedra, which provides a highly symmetric lattice field environment for Cr 3+ .…”

Section: Resultsmentioning

confidence: 99%

Realization of Broadband Near-Infrared Emission with High Thermal Stability in YGa₃(BO₃)₄: Cr³⁺ Borate Phosphor

Zou,

Hu,

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

As a key material for phosphor-converted light-emitting diodes (pc-LEDs) applications, broadband near-infrared (NIR) phosphors currently face poor thermal stability issues. In this work, we synthesized a broadband near-infrared phosphor YGa3(BO3)4: Cr3+ (YGBO: Cr3+) with a high thermal stability. The YGBO: Cr3+ sample exhibits a broadband near-infrared emission centered at 770 nm with a full width at half-maximum (fwhm) of 2130 cm–1 under blue light excitation. Benefiting from the borate host crystal’s strong structural rigidity, wide optical band gap, and weak electron–phonon coupling strength, YGBO: Cr3+ demonstrates strong luminescence thermal stability, and the corresponding luminescence intensity can maintain 80% at 150 °C compared to room temperature. Furthermore, we fabricated a pc-LED device using a blue light chip and YGBO: Cr3+ phosphor, and confirmed its application potential as a near-infrared light source in the spectral analysis of fruit freshness.

show abstract

Structural and magnetic properties of YAl3(BO3)4 and EuAl3(BO3)4 single crystals doped with Co2+

Cited by 7 publications

References 38 publications

EPR Study of Chromium Ions Doped Gallium Borate

EPR Study of Chromium Ions Doped Gallium Borate

Structural, Electronic and Vibrational Properties of YAl3(BO3)4

Realization of Broadband Near-Infrared Emission with High Thermal Stability in YGa₃(BO₃)₄: Cr³⁺ Borate Phosphor

Contact Info

Product

Resources

About

Structural and magnetic properties of YAl3(BO3)4 and EuAl3(BO3)4 single crystals doped with Co2+

Cited by 7 publications

References 38 publications

EPR Study of Chromium Ions Doped Gallium Borate

EPR Study of Chromium Ions Doped Gallium Borate

Structural, Electronic and Vibrational Properties of YAl3(BO3)4

Realization of Broadband Near-Infrared Emission with High Thermal Stability in YGa3(BO3)4: Cr3+ Borate Phosphor

Contact Info

Product

Resources

About

Realization of Broadband Near-Infrared Emission with High Thermal Stability in YGa₃(BO₃)₄: Cr³⁺ Borate Phosphor