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Shear Strain and Spontaneous Twisting of Ferroelastic Crystals Ba 2 NaNb 5 O 15 and K 2 Ba(NO 2 ) 4

โœ Scribed by Biryukov, A. V.; Gridnev, S. A.; Ivanov, O. N.; Vasil'eva, A. V.; Kirpichnikova, L. F.


Book ID
121462453
Publisher
Taylor and Francis Group
Year
2007
Tongue
English
Weight
308 KB
Volume
359
Category
Article
ISSN
0015-0193

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Spectroscopy and energy transfer paramet
โœ S. Bigotta; A. Toncelli; M. Tonelli; E. Cavalli; E. Bovero ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 288 KB

The absorption and emission spectra of Tm 3+ -and Ho 3+ -doped Ba 2 NaNb 5 O 15 crystals have been measured in the 1.5-2 lm region. The lifetimes of the lowest excited states have been measured at 10 and at 298 K. The cross sections of the (Tm) 3 F 4 M 3 H 6 and (Ho) 5 I 7 M 5 I 8 transitions have b