Wide-band EPR spectroscopy of YAlO3: Tm3+ single crystals

Asatryan, Georgi; Скворцов, А. А.; Shakurov, G. S.

doi:10.1134/s1063783413050028

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…The lowest energy structures of the pure and Tm-doped YAP are plotted in Figure . Figure clearly shows that the Tm 3+ impurity ion can naturally incorporate to the YAP host matrix in proportion to the nominal concentration and substitute the position of Y 3+ in the crystal lattice . The local [TmO 8 ]-unit is characterized by the point symmetry group C s , which is the same as the [YO 8 ]-unit.…”

Section: Resultssupporting

confidence: 90%

“…Figure 1 clearly shows that the Tm 3+ impurity ion can naturally incorporate to the YAP host matrix in proportion to the nominal concentration and substitute the position of Y 3+ in the crystal lattice. 17 The local [TmO 8 ]-unit is characterized by the point symmetry group C s , which is the same as the [YO 8 ]-unit. The bond lengths of the nearest interatomic distances of the Tm:YAP single crystal are in good agreement with the experiments reported by Matkovskii et al 45 Moreover, the bond lengths of Tm−O and Y−O are also quantitatively similar to each other, indicating that no distinct structural distortion occurred between the pure and the Tm-doped YAP.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…YAlO 3 is characterized by its intrinsic birefringence, enabling directly polarized laser emission. When doped with the rare-earth Tm 3+ cation, YAlO 3 (YAP) becomes an important source of radiation with an emission wavelength of approximately 2 μm. − These different types of emission channels can be further extended according to the symmetry of the rare-earth ion environment in the host crystal. The absorption peak at approximately 800 nm, which is mainly attributed to the 3 H 6 → 3 H 4 transition and the energy transitions between other Stark sublevels, will provide a much broader absorption band, making the diode pumping more accessible …”

Section: Introductionmentioning

confidence: 99%

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Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO₃: New Theoretical Insights

Lü

Yeung

et al. 2016

ACS Appl. Mater. Interfaces

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The recent renaissance of the use of rare-earth-doped yttrium orthoaluminate as an ideal laser material has generated significant interest; however, the unique structural features underlying many of its outstanding optical properties still require elucidation. To solve this intriguing problem, we performed a systematic first-principles study; the results of the study reveal a new stable phase for Tm-doped YAlO (YAP), of monoclinic Pm symmetry, with an 80-atom per unit cell. An unbiased CALYPSO structure search indicates that the Tm impurity ion tends to substitute the position of Y in the YAP crystal lattice. Electronic band structure calculations reveal that the insulated behaviors of YAP are significantly eliminated after doping the impure Tm ions, as evidenced by the minor energy gap of about 0.4 eV, which is close to the band gap energy of a 2 μm emitter source. On the basis of our developed crystal-field theory method, the 4f electronic structures and energies of Tm ions in the YAP crystal are calculated. The theoretical results indicate that the electric-dipole-induced transition H → H is mainly responsible for producing the light wave at approximately 2.3 μm. The present results provide an essential understanding of the rare-earth-ion-doped lasing materials and serve as a practical tool for further exploration of such materials.

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Section: Resultssupporting

confidence: 90%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO₃: New Theoretical Insights

Lü

Yeung

et al. 2016

ACS Appl. Mater. Interfaces

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“…Other reports of CW spectra in various crystal environments include for Tb 3+ [16,17,45,50,51] and for Tm 3+ [1,2,8,10,16,40,44,[52][53][54][55][56][57].…”

Section: Comparison With Prior Workmentioning

confidence: 99%

Electron Spin Relaxation of Tb3+ and Tm3+ Ions

et al. 2020

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Electron spin relaxation times T 1 and T m of Tb 3+ and Tm 3+ in 1:1 water:ethanol and of Tb 3+ doped (2%) in crystalline La 2 (oxalate) 3 decahydrate were measured between about 4.2 and 10 K. Both cations are non-Kramers ions and have J = 6 ground states. Echo-detected spectra are compared with CW spectra and with field-stepped direct-detected EPR spectra. Due to the strong temperature dependence of T 1 , measurements were not made above 10 K. Between about 4.2 and 6 K T 1 is strongly concentration dependent between 1 and ~50 mM. T 1 values at 4.2 K are in the μs range which is orders of magnitude faster than for 3d transition metals. Phase memory times, T m , are less than 500 ns, which is short relative to values observed for 3d transition metals and organic radicals at 4 K. T m is longer in the oxalate lattice which is attributed to the lower proton concentration in oxalate than in the organic solvent, which decreases nuclear spin diffusion. The rigidity of the crystalline lattice also may contribute to longer T m .

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Monoclinic centers of rare-earth S ions in yttrium orthoaluminate crystals

et al. 2017

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Wide-band EPR spectroscopy of YAlO3: Tm3+ single crystals

Cited by 4 publications

References 16 publications

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO₃: New Theoretical Insights

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO₃: New Theoretical Insights

Electron Spin Relaxation of Tb3+ and Tm3+ Ions

Monoclinic centers of rare-earth S ions in yttrium orthoaluminate crystals

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Wide-band EPR spectroscopy of YAlO3: Tm3+ single crystals

Cited by 4 publications

References 16 publications

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO3: New Theoretical Insights

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO3: New Theoretical Insights

Electron Spin Relaxation of Tb3+ and Tm3+ Ions

Monoclinic centers of rare-earth S ions in yttrium orthoaluminate crystals

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Product

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Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO₃: New Theoretical Insights

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO₃: New Theoretical Insights