Ion-velocity-dependent track formation in yttrium iron garnet: A thermal-spike analysis

Szenes, G.

doi:10.1103/physrevb.52.6154

Cited by 57 publications

(31 citation statements)

References 9 publications

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“…The approach of Szenes 92 excluded the velocity effect 52,54,93 and assumed that tracks generated by cluster projectiles and observed by TEM 73 result from the quenching of a molten phase. In contrast, the approach of Toulemonde et al takes into account the velocity effect 59,[72][73][74] and supposes that ion tracks in CaF 2 are a consequence of the quenching of a boiling phase.…”

Section: Track Formation In Cafmentioning

confidence: 99%

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

et al. 2012

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CaF 2 crystals as representatives of the class of ionic nonamorphizable insulators were irradiated with many different swift heavy ions of energy above 0.5 MeV/u providing a broad range of electronic energy losses (S e ). Beam-induced modifications were characterized by Channeling Rutherford Backscattering Spectrometry (C-RBS) and x-ray diffraction (XRD), complemented by transmission electron microscopy (TEM). Results from C-RBS give evidence of significant damage appearing above a S e threshold of 5 ± 2 keV/nm. A second critical S e appears around 18 ± 3 keV/nm; below this value the damage as function of ion fluence saturates at 20%, while above this the damage saturation level increases with S e , reaching ∼60% for ions of S e = 30 keV/nm. XRD measurements also show effects indicating two threshold values. Above 5 keV/nm, the widths of the XRD reflection peaks increase due to the formation of nanograins, as seen by TEM, while a significant decrease of the peak areas only occurs above 18 keV/nm. The track radii deduced from C-RBS measurements are in agreement with those extracted from the fluence evolution of the widths of the XRD peaks. Moreover, track radii deduced from the peak area analysis are slightly smaller but in agreement with previous track observations by high resolution electron microscopy. Calculations based on the inelastic thermal spike model suggest that the lower threshold at 5 keV/nm is linked to the quenching of the molten phase, whereas the threshold at 18 keV/nm can be interpreted as quenching of the boiling phase. The results of CaF 2 are compared with other nonamorphizable materials such as LiF and UO 2 .

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Section: Track Formation In Cafmentioning

confidence: 99%

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

et al. 2012

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“…vii. The origin of the velocity effect is the change of the thermal energy e = gS e with the specific ion energy E [15].…”

Section: The Atsm Modelmentioning

confidence: 99%

Comparison of two thermal spike models for ion–solid interaction

Szenes

2011

Nuclear Instruments and Methods in Physics Research Section B:

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“…In thermal spike model [3][4][5][6] material is considered as combination of the electronic subsystem and the lattice subsystem. The incoming ions transfer their energy to the electrons in 10 À 17 s and the electrons reach an equilibrium state in time in the order of 10 À 15 s. This energy is transferred to the atomic lattice by electron-phonon coupling.…”

Section: Structural Characterizationmentioning

confidence: 99%

“…It is well known that changes in the properties of materials are very much affected by the energy and types of ion beam [1][2][3][4][5][6]. The energy of any ion beam for irradiation experiment is generally selected such that the electronic stopping (S e ) value is very much larger ( $10 3 ) than the nuclear stopping value (S n ) [6].…”

Section: Introductionmentioning

confidence: 99%

Study of size dependent features of swift heavy ion irradiation in nanosized zinc ferrite

Singh

Dixit

Srivastava

et al. 2012

Journal of Magnetism and Magnetic Materials

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Ion-velocity-dependent track formation in yttrium iron garnet: A thermal-spike analysis

Cited by 57 publications

References 9 publications

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF2crystal: Evidence for two thresholds of damage creation

Comparison of two thermal spike models for ion–solid interaction

Study of size dependent features of swift heavy ion irradiation in nanosized zinc ferrite

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