High-temperature heat capacity of YbAl3(BO3)4

Денисов, В. М.; Денисова, Л. Т.; Гудим, И. А.; Temerov, V. A.; Patrin, G. S.; Волков, Н. В.; Чумилина, Л. Г.

doi:10.1134/s0036024414080093

Cited by 3 publications

(6 citation statements)

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“…In the present study, single-crystal samples of SmAl 3 (BO 3 ) 4 were synthesized successfully from a flux based on bismuth and lithium molybdates (Temerov et al, 2008). As was shown previously, this method is highly efficient for the preparation of high-quality single crystals of ReAl 3 (BO 3 ) 4 with a trigonal structure (Chaudhury et al, 2010;Kadomtseva et al, 2014;Boldyrev et al, 2012;Volkov et al, 2015;Ivanov et al, 2013Ivanov et al, , 2017Denisov et al, 2014;Malakhovskii et al, 2017;Aleksandrovsky et al, 2010). However, the structure of the SmAB samples synthesized in our work using the same method is monoclinic.…”

Section: Introductionmentioning

confidence: 53%

Monoclinic SmAl₃(BO₃)₄: synthesis, structural and spectroscopic properties

Oreshonkov

Shestakov

Мolokeev

et al. 2020

Acta Crystallogr Sect B

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Single crystals of SmAl3(BO3)4 were synthesized by the group growth on seeds method. The crystal structure was solved using a single-crystal experiment and the purity of the bulk material was proved by the Rietveld method. This borate crystallizes in the monoclinic C2/c space group with unit-cell parameters a = 7.2386 (3), b = 9.3412 (5), c = 11.1013 (4) Å and β = 103.2240 (10)°. IR and Raman spectroscopic analyses confirmed the monoclinic structure of SmAl3(BO3)4. Under 532.1 nm excitation, luminescence spectra exhibit bands assignable to the transitions from 4G5/2 to 6H5/2, 6H7/2, 6H9/2 and 6H11/2. The similarity of the luminescence spectra of the trigonal and monoclinic polymorphs is explained by the minor role of Sm—O bond distortion and the primary role of rotational distortion of SmO6 octahedra. The smaller covalency of the Sm—O bond in alumoborates is deduced in comparison with galloborates. Calorimetric measurements did not reveal high-temperature structural phase transitions up to a temperature of 720 K.

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Section: Introductionmentioning

confidence: 53%

Monoclinic SmAl₃(BO₃)₄: synthesis, structural and spectroscopic properties

Oreshonkov

Shestakov

Мolokeev

et al. 2020

Acta Crystallogr Sect B

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“…The temperature dependence of the specific heat of YbBP crystal is illustrated in Figure a. The results show that the specfic heat increased approximately linearly with temperature from1.00 J·g –1 ·K –1 at ambient temperature to 2.15 J·g –1 ·K –1 at 773 K. This ambient specific heat is larger than those of other stochiometric crystals such as YbVO 4 (0.37 J·g –1 ·K –1 ) and YbAl 3 (BO 3 ) 4 (0.64 J·g –1 ·K –1 ). , The higher specific heat of YbBP affords it a high optical damage threshold (∼700 MW/cm 2 ) and thus higher resistance to changes in temperature. , …”

Section: Results and Discussionmentioning

confidence: 93%

“…Thus, it was possible for Yb 3+ to revert to Yb 2+ . The absorption peak at 362 nm results from the 4f–5d electron transition of Yb 2+ ion in the crystal. , To further determine the oxygen vacancies exit, EPR was implemented, and the result was presented in the inset of Figure a. Only one unique peak was detected in the magnetic field intensity range of 346–3560 G, showing that one type of oxygen vacancy exists in the YbBP crystal lattice.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The results show that the specfic heat increased approximately linearly with temperature from1.00 J•g −1 •K −1 at ambient temperature to 2.15 J•g −1 •K −1 at 773 K. This ambient specific heat is larger than those of other stochiometric crystals such as YbVO 4 (0.37 J•g −1 •K −1 ) and YbAl 3 (BO 3 ) 4 (0.64 J•g −1 • K −1 ). 10,34 The higher specific heat of YbBP affords it a high optical damage threshold (∼700 MW/cm 2 ) and thus higher resistance to changes in temperature. 35,36 Figure 7b presents the coefficients of thermal diffusion of YbBP over the temperature between 298 to 773 K. The thermal diffusion coefficient λ was determined to be 0.26 mm 2 /s at ambient temperature.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Growth, Thermal, and Spectroscopic Properties of YbBa₃(PO₄)₃ Single Crystal: A New Stoichiometric Lasing Material

Fan

et al. 2020

Crystal Growth & Design

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Yb-doped materials can incorporate particularly high concentrations of Yb ion with weak concentration quenching, where high laser ion-doped materials with short absorption lengths permit the use of thin crystals with high absorption efficiencies. Herein, a new stoichiometric single crystal of YbBa 3 (PO 4 ) 3 with dimensions of ϕ 15 × 30 mm 3 was grown via the Czochralski pulling method. Rocking curve characterization showed that the asobtained YbBa 3 (PO 4 ) 3 crystal was of high quality, and the fullwidth at half-maximum measured from the (111) wafer was determined to be 28.8″. The crystal structure was characterized using single-crystal X-ray diffraction analysis. The results indicated that the crystal belongs to the cubic space group I4̅ 3d (No. 220) with cell parameters of a = b = c = 10.4352 (4) Å, V = 1136.32 (13) Å 3 , and Z = 4. The thermal and spectroscopic properties were evaluated, including the coefficient of thermal expansion, specific heat, thermal conductivity, and absorption and fluorescence spectra. The absorption cross-section at 975 nm and fluorescence lifetime were calculated as 1.02 × 10 −20 cm 2 and 220 μs, respectively. The emission cross-section at 1008 nm was determined to be 4.07 × 10 −20 cm 2 at room temperature, where the fullwidth at half-maximum of the emission peak was 75 nm, indicating that the stoichiometric crystalline YbBa 3 (PO 4 ) 3 is a promising laser crystal material.

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“…Molar heat capacity C p was determined by differen tial scanning calorimetry (Netzsch STA 449 C Jupiter system) using platinum crucibles. The measurement procedure was described in detail elsewhere [16,17]. The experimental data were analyzed using the Netzsch Proteus Thermal Analysis software package and licensed Systat Sigma Plot 12 graphing software.…”

Section: Introductionmentioning

confidence: 99%