Fresnoite thin films grown by pulsed laser deposition: photoluminescence and laser crystallization

Müller, Alexander; Lorenz, Michael; Brachwitz, Kerstin; Lenzner, J.; Mittwoch, Kai; Skorupa, W.; Grundmann, Marius; Höche, Thomas

doi:10.1039/c1ce05265a

Cited by 26 publications

(13 citation statements)

References 41 publications

(39 reference statements)

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“…Sr 2 TiSi 2 O 8 and Ba 2 TiGe 2 O 8 ) are non-centrosymmetric phases with excellent dielectric and optical properties, many researchers devoted time and effort to fabricate fresnoite-type GC and apply them to photonic components11171819202122. Recently, Yamazaki et al demonstrated the fabrication of a GC showing PSC, in which the crystalline domains are aligned along the crystallographic polar c -axis by isothermally heat treating a non-stoichiometric precursor glass with 35SrO−20TiO 2 −45SiO 2 composition17.…”

Section: Resultsmentioning

confidence: 99%

Parasitic amorphous on single-domain crystal: Structural observations of silicate glass-ceramics

Takahashi

Yamazaki

Ihara

et al. 2013

Sci Rep

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Glass-ceramics (GCs) are materials obtained from the crystallisation of functional phases in glass, and have a structure that the crystallised phase embedded in the glass matrix. Glass-forming oxides are commonly added to the functional phases to improve the stability of precursor glass; however, the issue of glass-ceramics permitting the presence of residual phases resulting from addition is required to be clarified. To elucidate this issue, we prepared ‘perfectly surface-crystallised’ GC consisting of fresnoite-type Sr2TiSi2O8 from a non-stoichiometric glass and performed texture/morphology observations. Numerous SiO2-rich binodal-like nanospheres (~10 nm) were parasitic on the fresnoite single-crystal domains. The parasitic texture is considered to form via the following process: (i) binodal-type phase separation into stoichiometric fresnoite (crystalline matrix) and SiO2-rich phases (amorphous nanoparticles) and (ii) single-domain formation by surface crystallisation in the matrix. Furthermore, in terms of texture, the resulting GC differs from the GCs reported to date, i.e., inverse GC.

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Section: Resultsmentioning

confidence: 99%

Parasitic amorphous on single-domain crystal: Structural observations of silicate glass-ceramics

Takahashi

Yamazaki

Ihara

et al. 2013

Sci Rep

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“…Fresnoite of the composition Ba 2 TiSi 2 O 8 (BTS) may form solid solutions with the systems Sr 2 TiSi 2 O 8 (STS, recently studied by synchrotron X-ray powder diffraction56) and Ba 2 TiGe 2 O 8 where GeO 2 is used to substitute SiO 2 78910. While oriented fresnoite has been prepared in the form of thin films1112 or thin crystal lines written in a glass matrix by laser induced crystallization1314, larger bodies of oriented fresnoite glass-ceramics may be produced by electrochemically induced nucleation15 and surface crystallization. While temperature gradients have been applied during the latter in the past1617, more recent results have shown that oriented layers of crystals also occur without this experimental effort.…”

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confidence: 99%

Microstructure of Transparent Strontium Fresnoite Glass-Ceramics

Wisniewski

Takano

Takahashi

et al. 2015

Sci Rep

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Glass-ceramics grown from a glass of the composition Sr2TiSi2.45O8.9 (STS 45) are analyzed by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). Oriented nucleation with the c-axes preferably perpendicular to the surface is detected. A very strong 001-texture is observed after only 10 μm of growth into the bulk, making this the first system in which an orientation preferred during nucleation prevails during growth into the bulk in glass-ceramics. Piezoelectric measurements are performed and d33-values presented and discussed. The obtained results are critically viewed with respect to the two growth models describing Sr2TiSi2O8 growth in glasses.

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“…[22][23][24][25][26] For the first time, tunable stoichiometry of nanostructured thin films of alkali-free glass was simultaneously achieved by using three different PLD targets: Si, BaTiO 3 , and B, an excimer laser, and a galvanometer for beam steering. [22][23][24][25][26] For the first time, tunable stoichiometry of nanostructured thin films of alkali-free glass was simultaneously achieved by using three different PLD targets: Si, BaTiO 3 , and B, an excimer laser, and a galvanometer for beam steering.…”

Section: Discussionmentioning

confidence: 99%

Tunable stoichiometry of SiO x - BaTiO y - BO z fabricated by multitarget pulsed laser deposition

et al. 2015

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Downloaded From: http://nanophotonics.spiedigitallibrary.org/ on 08/22/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspxAbstract. Oxide materials of desired stoichiometry are challenging to make in small quantities. Nanostructured thin films of multiple oxide materials were obtained by using pulsed laser deposition and multiple independent targets consisting of Si, BaTiO 3 , and B. Programmable stoichiometry of nanostructured thin films was achieved by synchronizing a 248-nm krypton fluoride excimer laser at an energy of 300 mJ∕pulse, a galvanometer mirror system, and the three independent target materials with a background pressure of oxygen. Island growth occurred on a per pulse basis; some 500 pulses are required to deposit 1 nm of material. The number of pulses on each target was programmed with a high degree of precision. Trends in material properties were systematically identified by varying the stoichiometry of multiple nanostructured thin films and comparing the resulting properties measured using in situ spectroscopic ellipsometry, capacitance measurements including relative permittivity and loss, and energy dispersive spectroscopy (EDS). Films were deposited ∼150 to 907 nm thickness, and in situ ellipsometry data were modeled to calculate thickness n and k. A representative atomic force microscopy measurement was also collected. EDS, ellipsometry, and capacitance measurements were all performed on each of the samples, with one sample having a calculated permittivity greater than 20,000 at 1 kHz.

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Fresnoite thin films grown by pulsed laser deposition: photoluminescence and laser crystallization

Cited by 26 publications

References 41 publications

Parasitic amorphous on single-domain crystal: Structural observations of silicate glass-ceramics

Parasitic amorphous on single-domain crystal: Structural observations of silicate glass-ceramics

Microstructure of Transparent Strontium Fresnoite Glass-Ceramics

Tunable stoichiometry of SiO x - BaTiO y - BO z fabricated by multitarget pulsed laser deposition

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