Excitation of different chromium centres by synchrotron radiation in MgO:Cr single crystals

Shablonin, E.; Попов, А. И.; Lushchik, A.; Kotlov, A.; Dolgov, S.

doi:10.1016/j.physb.2015.08.032

Cited by 18 publications

(15 citation statements)

References 35 publications

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“…The creation of electronic defects/excited states in the solid state by exposure to radiation is well known [4,[47][48][49][50][51]; after all the photographic industry used to be based upon this. In fact both X-ray detectors and self coloring sunglasses depend on the creation of such states.…”

Section: Electronic Defectsmentioning

confidence: 99%

Unexpected effects in non crystalline materials exposed to X-ray radiation

Bras

Stanley

2016

Journal of Non-Crystalline Solids

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Section: Electronic Defectsmentioning

confidence: 99%

Unexpected effects in non crystalline materials exposed to X-ray radiation

Bras

Stanley

2016

Journal of Non-Crystalline Solids

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“…The dielectric breakdown in MgO are previously observed to be strongly dependent on the impurity type doped into the structure. MgO crystals doped with Cu, Co, or H is reported to suppress the breakdowns, while the doping of Fe, Ni, Cr, or V enhanced it [12,13]. The sharp decrease in the value of the electric field with increasing MgO content can be assigned to the increase in the grain size that is associated with increasing MgO content.…”

Section: Resultsmentioning

confidence: 98%

Mechanical Properties and Effect of the MgO Content on the Dielectric Breakdown in the MgO/Binder Mixtures

Qasrawi¹,

Sadeddin²,

Alghamdi³

et al. 2016

JMSE-B

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In this study, the mechanical and electrical properties of the MgO powder and MgO solved in binder are investigated. For this purpose, the X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and electric field (E)-current (I) characteristics techniques are employed. Namely, the lattice parameters, the strain and the dislocation density of pure MgO powders and MgO solved in the binder are determined. The effect of MgO content on the electrical conduction is also investigated. The studies revealed that the binder is mostly composed of Na 2 O 2 : SiO 2 : CO 3. The X-ray diffraction patterns which were recorded for a 50% MgO-50% binder mixture were related to the cubic structured MgO as major phase, the hexagonal structured Na 2 O 2 and SiO 2 as minor phases. While both of the MgO and Na 2 O 2 caused compressing strains in grains of sizes of 50 and 27 nm, respectively, the SiO 2 phase exhibit stretching strain in grains of a size of 21 nm. The solving of the MgO powder in the binder enlarged the grains of MgO from 9 to 50 nm. On the other hand, the E-I variations have shown that the amount of the MgO content in the binder highly shifts the dielectric breakdown limit toward lower values of applied electric field. The critical electric field at which the breakdown takes place reduces from 286 to 14 V/cm as the MgO content is increased from 20% to 99%, respectively.

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“…This experimental set-up is a unique tool for investigations of different types of wide band gap materials [29][30][31][32][33][34]. Synchrotron radiation intensity was 10 12 photons per second.…”

Section: Methodsmentioning

confidence: 99%

Long-term evolution of luminescent properties in CdI2 crystals

Karbovnyk

Bolesta

Rovetskyi

et al. 2016

Low Temperature Physics

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Fresh and aged melt-grown or gas-phase grown CdI 2 crystals are studied by means of low-temperature photoluminescence spectroscopy. Noticeable transformations of emission spectra are observed after long-term aging. The formation of nanostructures containing cadmium oxide and cadmium hydroxide as well as the changes in local surrounding of iodine atoms and the possible growth of polytypic modifications of CdI 2 are taken into account when considering the diversity of optical spectra. PACS: 78.55.-m Photoluminescence, properties and materials; 78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures.

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Excitation of different chromium centres by synchrotron radiation in MgO:Cr single crystals

Cited by 18 publications

References 35 publications

Unexpected effects in non crystalline materials exposed to X-ray radiation

Unexpected effects in non crystalline materials exposed to X-ray radiation

Mechanical Properties and Effect of the MgO Content on the Dielectric Breakdown in the MgO/Binder Mixtures

Long-term evolution of luminescent properties in CdI2 crystals

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