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From the intensity profile of the X-ray diffraction pattern in the nematic phase of 40BA it is inferred that the alkoxy chains have an orientational order. 相似文献
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K. Usha Deniz E. B. Mirza P. S. Parvathanathan A. V. Patankar A. S. Paranjpe 《Molecular Crystals and Liquid Crystals》2013,570(2-4):271-276
The phase transitions occurring in nBABAs (n = 1 to 5), especially those involving the nematic phase, have been studied by DSC. Schemes of transition are presented and the chain length (n) dependences of the the transition temperatures and entropies are discussed. 相似文献
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The magnetic structure factors of MnAlGe (space groupP4/nmm) measured with polarised neutrons have been expressed in terms of the magnetic moment of the Mn atom (site symmetry tetrahedral with tetragonal distortion), the Bessel transforms 〈j n〉 of the Mn radial functions and the fractional occupancies of the moment density in the various crystal field orbitals. The measured structure factors were least-squares fitted with the theoretical expression involving 〈j n〉 appropriate to the Mn0, Mn+ and Mn2+ atoms. The best fit was got using Mn0 transforms, yielding 1·45µ B as the Mn magnetic moment. The fractional occupancies of the moment density in the crystal field orbitalsA 1g,B 1g E g andB 2g were obtained. This analysis shows the magnetic moment to be highly non-spherical with a large fractional occupancy (38%) in theA 1g orbital directed along the tetragonal axis while the fractional occupancies ofB 1g andB 2g are found to be 31% and 30% respectively. The fractional occupancy of the moment in theE g orbital directed towards the Ge and Al atoms is very low (1%). The spatially averaged moment density of Mn in MnAlGe is more diffuse than that of Mn I and Mn II in isostructural Mn2Sb. 相似文献
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G. R. Paranjpe Y. G. Naik M. Witte J. W. Matthews und H. V. A. Briscoe 《Fresenius' Journal of Analytical Chemistry》1936,104(5-6):238-240
Ohne Zusammenfassung 相似文献
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Pramod A. Paranjpe 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1964,15(6):598-608
Zusammenfassung Unter Verwendung einer vereinfachten Betrachtungsweise für die nicht-stationären aerodynamischen Kräfte wird ein Kriterium für das Zustandekommen von selbst-erregten Schwingungen bei Axialturbinen- bzw. Axialkompressoren-Schaufeln angegeben, die entlang ihrer Höhe sowohl aerodynamisch wie auch geometrisch veränderliche Eigenschaften aufweisen. Es werden dynamische Gleichungen in verallgemeinerter Form hergeleitet und auf ihre Lösung mit Hilfe der Phasenebene hingewiesen. Ferner wird die Möglichkeit von Relaxationsschwingungen, die durch endliche Unstetigkeit in der Auftriebscharakteristik hervorgerufen werden können, untersucht. Das Ergebnis dieser Untersuchung hat gezeigt, dass diese Möglichkeit bei den in der Praxis vorkommenden Steifigkeiten und Dämpfungseigenschaften der Schaufeln kaum besteht. 相似文献
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Sudhish?KumarEmail author Anjali?Krishnamurthy Bipin?K.?Srivastava A.?Das S.?K.?Paranjpe 《Pramana》2004,63(2):199-205
Crystal structure and magnetic behaviour of FeCrP have been investigated using magnetization and neutron diffraction measurements.
FeCrP crystallizes in orthorhombic FeZrP type structure (Pnma space group,Z = 4) in which Cr atoms occupy the pyramidal site and Fe atoms occupy the tetrahedral site with total preference. Structural
parameters including positional parameters have been refined. The refined values of positional parameters for Fe and Cr are
quite different from those in FeZrP. The nature of magnetization-temperature curve is suggestive of antiferromagnetic nature
withT
N = 280 (±10) K. Preliminary analysis of neutron diffraction pattern at 13 K is indicative of a rather complicated magnetic
structure. 相似文献
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N S Satya Murthy S K Paranjpe Marsongkohadi Kurniadi Sumaamidjaja M R L N Murthy 《Pramana》1985,24(1-2):311-316
The magnetic structures of Fe4N and Mn4N have been redetermined using neutron diffraction. The magnetic form factors, obtained from polarised neutron data have been
shown to be different for the face-centred and corner atoms. A qualitative explanation of the structures of Fe4N and Mn4N has been provided from the shapes of the magnetic form factors.
Since deceased. 相似文献