Zobrazeno 1 - 10
of 436
pro vyhledávání: '"B. Wyncke"'
Autor:
B. Wyncke
Publikováno v:
16th International Conference on Infrared and Millimeter Waves.
Potassium dihydrogen phosphate (KDP) undergoes a paraelectric (PE) to ferroelectric (FE) phase transition at 123 K. The primitive cell containing two formula units changes from the tetragonal symmetry (I42d) in the PE phase, to the orthorhombic symme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9214dabec43a6b9afba7a7fa0896ae32
https://doi.org/10.1117/12.2297980
https://doi.org/10.1117/12.2297980
Publikováno v:
Journal of Physics D: Applied Physics. 32:227-233
An experimental method for the accurate measurement of the optical birefringence of thick anisotropic crystal plates using optical modulation of the incident light beam is described in detail. The significant advantages in the present experimental me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b1faedf3ba33979b78f8a4dbb457fd2
https://doi.org/10.1088/0022-3727/32/3/008
https://doi.org/10.1088/0022-3727/32/3/008
Publikováno v:
Journal of Physics: Condensed Matter. 10:6865-6873
Calcium niobium gallium garnet (CNGG), a new non-linear optical material, is studied by Raman and infrared reflectivity spectroscopy at low and at room temperature for various scattering configurations. No structural phase transition is observed in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da7316b0e2caa51a253bd55e1105b51a
https://doi.org/10.1088/0953-8984/10/31/005
https://doi.org/10.1088/0953-8984/10/31/005
Publikováno v:
Philosophical Magazine B. 77:849-857
Brillouin-zone widths are deduced from fivefold electron diffraction patterns for a quasicrystalline sample of Al59Cu25.5Fe12.5B3. Optical measurements in the infrared were also performed on the same alloy. The results were analysed by the Kramers-Kr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a45be20f5e96e4fedbd4dca9d383708
https://doi.org/10.1080/13642819808214838
https://doi.org/10.1080/13642819808214838
Publikováno v:
Journal of Physics: Condensed Matter. 10:1621-1641
Accurate x-ray data sets were collected at different temperatures for mixed crystals of , where x = 0.9, 0.8, 0.5, 0.4 and 0.0. The phase transition temperatures of and were observed at K and K respectively. The vibration amplitudes are found to be l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cfb61fc790bd213ac844f26ab0c2cc3
https://doi.org/10.1088/0953-8984/10/7/011
https://doi.org/10.1088/0953-8984/10/7/011
Publikováno v:
Scopus-Elsevier
The entire vibrational spectrum of a single crystal of l -histidinium dihydrogen orthophosphate orthophosphoric acid (LHP) was studied by infrared (IR) spectroscopy from 10 up to 4000 cm −1 . The polarized infrared (IR) reflectivity spectra were me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5823da9018bcf658855a1648f01054a
https://doi.org/10.1016/s1350-4495(97)00029-7
https://doi.org/10.1016/s1350-4495(97)00029-7
Publikováno v:
International Journal of Infrared and Millimeter Waves. 18:1663-1679
The optical constants of crystal quartz in the far infrared (10 – 600 cm−1) are reported at room temperature and at 10 K, for both polarizations parallel and perpendicular to the c-axis, respectively extraordinary and ordinary ray. These constant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab3bf95d897148b7de5ceb3ad25398f0
https://doi.org/10.1007/bf02678278
https://doi.org/10.1007/bf02678278
Publikováno v:
Journal of Physics: Condensed Matter. 9:6555-6562
We report on a neutron diffraction study of ammonium dihydrogen phosphate in the paraelectric phase at 158 K, i.e. slightly above the transition temperature to the antiferroelectric phase. The data have been refined in the space group using both an o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4d0c6cfd1837edab90289e773b1e743
https://doi.org/10.1088/0953-8984/9/31/009
https://doi.org/10.1088/0953-8984/9/31/009
Publikováno v:
International Journal of Infrared and Millimeter Waves. 18:475-489
Spectroscopic studies using far infrared reflectivity and transmissivity measurements between 10 and 600 cm−1, were performed on plane parallel quartz crystal plates, in the temperature range 10–300 K. The temperature dependence of the optical mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3caa8b86c6bb92906d3cb71788a7af6d
https://doi.org/10.1007/bf02677934
https://doi.org/10.1007/bf02677934
Publikováno v:
Optical and Quantum Electronics. 29:441-450
The spontaneous and electric field induced phase retardations have been measured as a function of temperature in a KDP crystal using an accurate method. The plots of these retardations versus temperature reveal unexpected undulations. We consider the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9220060e5d08e0c1705658fd47e6bdfe
https://doi.org/10.1023/a:1018547331718
https://doi.org/10.1023/a:1018547331718