The Search for Prospective Media for the Application as Active Laser Elements

Arsenev, P. A.; Bagdasarov, Kh. S.; Senff, I.; Потемкин, А. В.

doi:10.1002/crat.19780130102

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…At elevated temperatures both compounds undergo structural phase transitions. PrAlO 3 with rhombohedral structure continuously transforms to the cubic perovskite structure at 1770 K [1][2][3][4][5], whereas a first-order phase transition from an orthorhombic to a rhombohedral structure occurs in SmAlO 3 within the temperature range of 1023-1058 K [6][7][8]. One more phase transition from the rhombohedral to the cubic perovskite structure was observed in SmAlO 3 at 2223 K [7]; however, this transition has not been confirmed by other research groups.…”

Section: Introductionmentioning

confidence: 97%

Phase and Structural Behaviour of the PrAlO₃-SmAlO₃System

et al. 2010

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High resolution in situ X-ray powder diffraction applying synchrotron radiation and differential thermal analysis/scanning calorimetry methods have been used to examine the pseudo-binary system PrAlO 3 -SmAlO 3 . Two kinds of solid solutions with rhombohedral and orthorhombic structure exist at room temperature. At elevated temperatures, a continuous phase transition P m3m ↔ R3c and a first-order transformation R3c ↔ P bmn occur in the two respective phases. A sequence of low-temperature phase transformations R3c ↔ Imma ↔ C2/m has been detected in Pr 1−x Sm x AlO 3 samples with x < 0.35. Based on in situ powder diffraction and differential thermal analysis/scanning calorimetry data, the phase diagram of the pseudo-binary system PrAlO 3 -SmAlO 3 has been constructed.

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Section: Introductionmentioning

confidence: 97%

Phase and Structural Behaviour of the PrAlO₃-SmAlO₃System

et al. 2010

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Effect of γ‐irradiation on the lattice parameter and colour centre concentration in pure Ca²⁺, Sr²⁺ and Eu²⁺ doped KCI crystals

Damm

Stȩpień‐Damm

1980

Cryst Res and Technol

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The changes of lattice parameter and colour centre concentration are examined in KCI crystals (both pure and Me2+‐doped) irradiated by γ‐rays at room temperature. For the pure crystals the relative volume change vs. F‐centre concentration plot reveals the presence of two stages, one ascribed to the introduction of colour centre pairs (or F centres only) and other to the generation of the new dislocations (or new dislocations with trapped‐hole centres). In Me2+ doped crystals the lattice expansion bears a complex character (in the initial irradiation stage a transient maximum appears). Additional anomaly appears in Eu2+ KCI in the high‐dose range where in spite of a distinct F‐centre concentration drop a marked raise of the lattice parameter is observed.

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