Crystal growth, structure, infrared spectroscopy, and luminescent properties of rare-earth gallium borates RGa3(BO3)4, R=Nd, Sm–Er, Y

Magneto-optical spectroscopy based on the transverse magneto-optical Kerr effect (TMOKE) is a sensitive method for investigation of magnetically-ordered media. However, in magnetic materials the optical transitions are usually characterized by spectrally broad resonances with widths considerably exceeding the Zeeman splitting in the magnetic field. Here we investigate experimentally and theoretically the TMOKE in the vicinity of relatively narrow optical resonances provided by confined quantum systems. For experimen-1 arXiv:1810.13344v1 [cond-mat.mtrl-sci]

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“…Apart from X-ray, the visible and infrared spectra also demonstrate narrow lines [31][32][33][34][35].…”

Section: Discussionmentioning

confidence: 99%

Transverse magneto-optical Kerr effect at narrow optical resonances

et al. 2019

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“…In the overwhelming number of cases, the crystal structures (first of all, coordinates of atoms) of the samples were refined by the full-profile Rietveld method on polycrystalline samples obtained by the solid-state reaction (LnFe 3 (BO 3 ) 4 with the Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, (Y), Ho; LnGa 3 (BO 3 ) 4 with the Ln = Sm, Gd, Y, Ho, Er) [34,53] or on single crystals synthesized by the flux method and ground to a powder (LnAl 3 (BO 3 ) 4 with the Ln = Nd, Sm, Eu, Gd, Tb, Dy, (Y), Ho, Er, Yb; LnFe 3 (BO 3 ) 4 with the Ln = Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, (Y), Ho; LnGa 3 (BO 3 ) 4 with the Ln = Gd) [1,54,56,59,61,66,68]. Assignment of a series of rare-earth orthoborates (LnAl 3 (BO 3 ) 4 with the Ln = Nd, Eu, Gd, Tb, Dy, (Y), Ho, Er, Tm, Yb; LnFe 3 (BO 3 ) 4 with the Ln = Eu, Gd, Y; LnCr 3 (BO 3 ) 4 with the Ln = Sm, Eu, Gd, Tb, Dy; LnGa 3 (BO 3 ) 4 with the Ln = Nd, Eu, Gd, (Y), Ho) to the space group R32 is performed on powdered single crystals obtained by the flux method using IR spectroscopy coupled with the group-theoretical analysis [26,42,45,51,70,71,73], temperature-dependent high-resolution optical absorption Fourier spectroscopy and Raman spectroscopy (LnFe 3 (BO 3 ) 4 with the Ln = Pr, Nd) [57,58,60].…”

Section: Methodsmentioning

confidence: 99%

“…R32: D/? [27], D/S [73], IR/P [51,73] R32: D/S [88] Gd R32: D/P [1], D/? [27], D/S [50], D/P [52], IR/P [42,45] C2: D/S [46,47] R32: D/?…”

Section: Methodsmentioning

confidence: 99%

Crystallochemical Design of Huntite-Family Compounds

et al. 2019

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Huntite-family nominally-pure and activated/co-activated LnM3(BO3)4 (Ln = La–Lu, Y; M = Al, Fe, Cr, Ga, Sc) compounds and their-based solid solutions are promising materials for lasers, nonlinear optics, spintronics, and photonics, which are characterized by multifunctional properties depending on a composition and crystal structure. The purpose of the work is to establish stability regions for the rare-earth orthoborates in crystallochemical coordinates (sizes of Ln and M ions) based on their real compositions and space symmetry depending on thermodynamic, kinetic, and crystallochemical factors. The use of diffraction structural techniques to study single crystals with a detailed analysis of diffraction patterns, refinement of crystallographic site occupancies (real composition), and determination of structure–composition correlations is the most efficient and effective option to achieve the purpose. This approach is applied and shown primarily for the rare-earth scandium borates having interesting structural features compared with the other orthoborates. Visualization of structures allowed to establish features of formation of phases with different compositions, to classify and systematize huntite-family compounds using crystallochemical concepts (structure and superstructure, ordering and disordering, isostructural and isotype compounds) and phenomena (isomorphism, morphotropism, polymorphism, polytypism). Particular attention is paid to methods and conditions for crystal growth, affecting a crystal real composition and symmetry. A critical analysis of literature data made it possible to formulate unsolved problems in materials science of rare-earth orthoborates, mainly scandium borates, which are distinguished by an ability to form internal and substitutional (Ln and Sc atoms), unlimited and limited solid solutions depending on the geometric factor.

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“…units Исключая первое соединение в таблице, на расчете оптической нелинейности которого в наибольшей степени сказалось сильное поглощение излучения неоди-мового лазера, исследованные бораты галлатного ряда демонстрируют один порядок оптической нелинейности, совпадающий с имеющимися данными для YAl 3 (BO 3 ) 4 , d 11 = 1.7 [18]. Существенно меньшее значение для NdGa 3 (BO 3 ) 4 может быть также обусловлено примесью центросимметричной фазы C2/c [22].…”

Section: методика оценки нелинейно-оптических свойствunclassified

“…Гораздо менее изучены галлиевые бораты из семейства хантитов. Имеются единичные работы по изучению кристаллической структуры, условий роста [3,[19][20][21][22] и спектроскопических свойств [22]. В частности, в работе [22]…”

Section: Introductionunclassified

Люминесцентные и нелинейно-оптические свойства боратов LnGa-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-4-=/SUB=- (Ln = Nd, Sm, Tb, Er, Dy, Ho)

Kuz'min¹,

Болдырев²,

Леонюк³

et al. 2019

Журнал Технической Физики

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Luminescence spectra of single crystals of rare-earth gallium borates LnGa_3(BO_3)_4 (Ln = Nd, Sm, Tb, Er, Dy, or Ho) at room (300 K) and cryogenic (10 K) temperatures are presented for the first time. Photoluminescence has been recorded in the wavelength range of 470–5000 nm (2000–21 300 cm^–1) with a high spectral resolution (down to 0.1 cm^–1) upon excitation by different diode lasers. The spectra obtained cannot be unambiguously interpreted within one luminescent center, which can be due to the presence of defects and/or inclusions of other crystalline phases. The optical nonlinearity of rare-earth–gallium borates has been estimated using the Kurtz–Perry powder technique. The typical intensities of the second-harmonic generation in gallium borate powders are 30–40 (with respect to quartz), and the optical nonlinearity is as good as the nonlinearity of the efficient rare-earth aluminum borate YAl_3(BO_3)_4.

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Crystal growth, structure, infrared spectroscopy, and luminescent properties of rare-earth gallium borates RGa3(BO3)4, R=Nd, Sm–Er, Y

Cited by 33 publications

References 25 publications

Transverse magneto-optical Kerr effect at narrow optical resonances

Transverse magneto-optical Kerr effect at narrow optical resonances

Crystallochemical Design of Huntite-Family Compounds

Люминесцентные и нелинейно-оптические свойства боратов LnGa-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-4-=/SUB=- (Ln = Nd, Sm, Tb, Er, Dy, Ho)

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