Zobrazeno 1 - 10
of 920
pro vyhledávání: '"F. H. Dacol"'
Publikováno v:
Journal of Applied Physics. 75:8098-8108
The utility of Raman spectroscopy for the simultaneous determination of composition and strain in thin GexSi1−x layers has been investigated. Using data from the literature and new data for the strain shift of the Si‐Si phonon mode presented here
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7be4995bea733f04ab398629a48a336a
https://doi.org/10.1063/1.356554
https://doi.org/10.1063/1.356554
Publikováno v:
Physical Review B. 43:10544-10547
X-ray photoemission spectra (XPS) and Raman measurements of ${\mathrm{Y}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Eu}}_{\mathit{x}}$${\mathrm{Ba}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ and ${\mathrm{Eu}}_{1\mathrm{\ensuremath{-}}\mathit{x}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23fc491e771a12e887b02490d94d2a2a
https://doi.org/10.1103/physrevb.43.10544
https://doi.org/10.1103/physrevb.43.10544
Publikováno v:
Solid State Communications. 77:367-371
We report polarized Raman measurements on single crystals of YBa2Cu3Ox, Y123-Ox, as a function of oxygen content. For x=7 the usual five, c-axis polarized modes are observed; mode #5 occurs ∼500 cm−1 and is due to the oxygen atoms in the four-coo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1f420b0c89fa1ce60fb99bf5b2616c4
https://doi.org/10.1016/0038-1098(91)90752-h
https://doi.org/10.1016/0038-1098(91)90752-h
Publikováno v:
Physical Review B. 42:10777-10780
La{sub 2}NiO{sub 4+{delta}} ({delta}=0) has a high-temperature tetragonal (HTT) phase ({ital T}{gt}680 K), a low-temperature orthorhombic (LTO) phase, and a low-temperature tetragonal (LTT) phase ({ital T}{lt}70 K); that is, HTT{r arrow}LTO{r arrow}(
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8f4d54dd8b9ca791bb3ec249a74e6f6
https://doi.org/10.1103/physrevb.42.10777
https://doi.org/10.1103/physrevb.42.10777
Publikováno v:
Physica C: Superconductivity. 171:31-36
We present polarized Raman measurements of small single crystals embedded in Y 1− x Eu x Ba 2 Cu 3 O 7 polycrystalline pellets. Superconductivity remains unsuppressed through the entire range of x . With increasing x , the frequency increase of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d88ce416a3d89de4e9d8c200d1a460c
https://doi.org/10.1016/0921-4534(90)90452-k
https://doi.org/10.1016/0921-4534(90)90452-k
Publikováno v:
Solid State Communications. 75:893-896
From Raman measurements on superconducting and non-superconducting YBa 2 Cu 3 O 7-δ single crystals, we show that close to room temperature there is an unaccounted for, intense, oxygen vibrational mode at 598 cm −1 . This (zz) polarized mode appea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b97976f5615e33598a7cfd7d05bbbe3b
https://doi.org/10.1016/0038-1098(90)90405-z
https://doi.org/10.1016/0038-1098(90)90405-z
Publikováno v:
Physica C: Superconductivity. 170:80-86
We explore the symmetries and structural similarities within the single layer Tl high- T c materials with n immediately adjacent Cu-O planes, which we designate 1-Tl( n ). The same approach is taken for the double layer Tl materials, called 2-Tl( n )
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bd6b06be390532134202cf209b388ac
https://doi.org/10.1016/0921-4534(90)90232-4
https://doi.org/10.1016/0921-4534(90)90232-4
Publikováno v:
Physical Review B. 42:4240-4243
We report polarized Raman measurements on small single crystals embedded in ${\mathrm{Y}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Pr}}_{\mathit{x}}$${\mathrm{Ba}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ polycrystalline pellets. The measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3064a4cbcd2aca29ff95f5ec01ba76c5
https://doi.org/10.1103/physrevb.42.4240
https://doi.org/10.1103/physrevb.42.4240
Autor:
F. H. Dacol, Gerald Burns
Publikováno v:
Journal of Solid State Chemistry. 88:188-192
The two most widely studied families of high-temperature superconductors are TlBa{sub 2}Ca{sub n{minus}1}Cu{sub n}O{sub 3+2n} called 1-Tl(n) and Tl{sub 2}Ba{sub 2}Ca{sub n{minus}1}Cu{sub n}O{sub 4} + 2{sub n} called 2-Tl(n). The authors consider the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ee165805eed35101a46d82d711f8bd9
https://doi.org/10.1016/0022-4596(90)90214-i
https://doi.org/10.1016/0022-4596(90)90214-i
Publikováno v:
Ferroelectrics. 108:189-193
Using Raman spectroscopy, we have measured the A1(TO) and E(TO) phonons in the tungsten bronze structured ferroelectric Ba0.4Sr0.6Nb2O6 (BSN). We observe phonon anomalies associated with Tc and also with a temperature≈ 425°C. The latter is in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eeeb0de7f5a5ee620c290d13c95fee9
https://doi.org/10.1080/00150199008018755
https://doi.org/10.1080/00150199008018755