Ion-Beam-Induced Defects and Defects Interactions in Perovskite-Structure Titanates

Synergy of elastic and inelastic energy loss on ion track formation in SrTiO3

“…Since such tracks can be produced with intermediate energy ions, which are widely available in research and industry, this work provides a new pathway for the exploitation of such tracks in SrTiO 3 substrates and thin films. Due to differences in thermal stabilities of the low concentration of defects and the amorphous tracks 23 25 , thermal annealing may lead to isolated amorphous tracks or pillars embedded in a highly crystalline matrix. Based on what is currently known on the chemical and physical properties of these nanoscale amorphous tracks and their interface structures in SrTiO 3 , there are numerous possible impacts; these include: 1) selective chemical etching of tracks or patterns created by ion-beam writing in 3D nanofabrication; 2) creating amorphous pillars or patterns of well-defined length from the surface or buried in the matrix; 3) using the heterointerface structure or further modifying the interface structure to create new one-dimensional electronic and magnetic functionalities; and 4) utilize the unique polarity of amorphous SrTiO 3 to create one-dimensional polarity normal to surface in controlled patterns.…”

“…Irradiation of SrTiO 3 at temperatures below ~370 K with 0.1–1.0 MeV ions leads to a crystalline-to-amorphous transformation due to the production and accumulation of atomic defects created by elastic energy transfer to atomic recoils 22 23 24 , and the temperature dependence of this transformation is controlled by defect recovery stages active below 350 K 25 . The chemical etch rate of the irradiation-induced amorphous structure is at least three orders of magnitude higher than the single crystal rate 26 , which has been used in combination of 1 MeV Pt ion irradiation to produce sub-100 nm patterns in SrTiO 3 substrates.…”

Effects of low pressure plasma irradiation on electrical resistivity of perovskite oxide Eu 1-x Sr x MnO 3

“…The requirement of structural stability due to impingement of high energetic particles was of high demand. The physics of phase transformation from crystalline to amorphous under the irradiation of energetic ion beams holds a clue to develop new materials [10]. It was shown that the interaction amongst irradiation induced defects plays a major role for the phase transformation.…”

Ab initiomolecular dynamics simulations of threshold displacement energies in SrTiO3

“…SrTiO 3 has received much attention both experimentally and theoretically with respect to its defect chemistry and radiation resistance. Experimentally, different low energy ion species have been used for implantation and irradiation in order to understand the changes in electrical, optical and mechanical properties of SrTiO 3 [7][8][9][10][11][12][13]. Several of these studies focused on irradiation-induced amorphization and subsequent recrystallization of SrTiO 3 .…”

“…Several of these studies focused on irradiation-induced amorphization and subsequent recrystallization of SrTiO 3 . Experimental work has shown that radiation damage in SrTiO 3 progresses primarily via accumulation and interaction of point defects [9][10][11][12][13], rather than via direct impact amorphization. Thermal annealing of these defects occurs over a broad temperature range, with significant defect recovery below 400 K [12] and epitaxial recrystallization around 800 K [7].…”