Phase transformations and defect clusters in single crystal SrTiO3 irradiated at different temperatures

Abstract Radiation damage mechanisms in single crystal SrTiO 3 irradiated with 250 keV Ne ions to a fluence of 1.11 × 10 20  ions/m 2 at both room temperature and 773 K were systematically investigated. The irradiation-induced microstructural evolution was characterized using transmission electron microscopy. Ion irradiation at room temperature results in amorphization of crystalline SrTiO 3 near the peak damage region at this fluence. On the other hand, ion irradiation at high temperature leads to less irradiation-induced damage in SrTiO 3 due to the higher recovery rate of defects. Nevertheless, the formation of dislocation loops has been observed in the SrTiO 3 crystals irradiated at high temperature. These dislocation loops were determined to be unfaulted loops with Burgers vector along 〈0 1 1〉.

[1]  Lupi,et al.  Observation of a midinfrared band in SrTiO3-y. , 1993, Physical review. B, Condensed matter.

[2]  B. Sheldon,et al.  The measurement and analysis of epitaxial recrystallization kinetics in ion-beam-amorphized SrTiO_3 , 1994 .

[3]  C. Sabathier,et al.  Dose rate and temperature effects in radiation disorder creation in SrTiO3 , 2002 .

[4]  W. J. Weber,et al.  Amorphization and recrystallization of the ABO3 oxides , 2002 .

[5]  C. English,et al.  Characterization of heavy-ion damage in ruthenium: I. Vacancy-loop crystallography , 1987 .

[6]  S. Ogale.  Thin films and heterostructures for oxide electronics , 2005 .

[7]  R. Ewing,et al.  Effects of ionizing and displacive irradiation on several perovskite-structure oxides , 1998 .

[8]  M. Takano,et al.  Blue-light emission at room temperature from Ar+-irradiated SrTiO3 , 2005 .

[9]  Zaoli Zhang,et al.  Irradiation-induced dissociation of an a ⟨100⟩ edge dislocation in SrTiO3 , 2003 .

[10]  L. Vernon,et al.  The role of non-stoichiometric defects in radiation damage evolution of SrTiO3 , 2013 .

[11]  K. Oyoshi,et al.  Study of ion beam induced epitaxial crystallization of SrTiO3 , 2000 .

[12]  W. J. Weber,et al.  Ion-induced damage accumulation and electron-beam-enhanced recrystallization in srtio3 , 2005 .

[13]  B. Eyre,et al.  On the formation of interstitial loops in b.c.c. metals , 1965 .

[14]  C. White,et al.  Ion implantation and annealing of crystalline oxides , 1989 .

[15]  D. Bürger,et al.  Defect-induced ferromagnetism in crystalline SrTiO3 , 2011 .

[16]  M. Engelhard,et al.  Irradiation behavior of SrTiO3 at temperatures close to the critical temperature for amorphization , 2006 .

[17]  L. Hobbs,et al.  CHAPTER 7 - Radiation Effects in Non-Metals* , 1986 .

[18]  J. Ziegler,et al.  stopping and range of ions in solids , 1985 .

[19]  D. Bacon.  The elastic energies of elliptical dislocation loops , 1966 .

[20]  Gary S. Was,et al.  Fundamentals of Radiation Materials Science: Metals and Alloys , 2007 .

[21]  Effect of high-energy Si+ ion irradiation on the crystallization behavior of amorphous strontium titanate films , 2002 .

[22]  Steven J. Zinkle,et al.  Radiation effects in crystalline ceramics for the immobilization of high-level nuclear waste and plutonium , 1998 .

[23]  J. Schooley,et al.  SUPERCONDUCTIVITY IN SEMICONDUCTING SrTiO$sub 3$ , 1964 .