Study of SHI-induced ion beam mixing in Y3+: YIG employing X-ray diffraction and Mössbauer spectroscopy

Abstract

The consequences of swift heavy ion (SHI) irradiation (Li 3+ , 50 MeV, fluence = 5× 10 13 ions/cm 2 ) on the structural and microscopic magnetic properties of Y 3+ -substituted yttrium iron garnet (Y 3+x Fe 5−x O 12 , x = 0.0, 0.2 and 0.4) have been studied at 300 K. It is found that an additional YFeO 3 -phase observed along with bcc garnet phase, is completely removed for x = 0.2 composition while its percentage formation considerably reduces for x = 0.4 composition after irradiation. Similar effect has been observed for specimens sintered at 1,500 • C. The SHI-induced ion beam mixing has been revealed through X-ray diffraction and Mössbauer spectroscopy.

Pre and Post Effect of Swift Heavy Ion Irradiation on Infrared Spectral Evolution of Y₃₊<i>_x</i>Fe_5-<i>_x</i>O₁₂ (<i>x</i> = 0.0 - 1.0) System

“…The detail discussion on influence of Y 3+ (0.89 Å) ion substitution for Fe 3+ (0.64 Å ) ion and pre and post effect of SHI irradiation by Li 3+ ion beam (energy: 50 MeV and fluence: 5 x 10 13 ions/cm 2 ) on various physical properties of Y 3+x Fe 5-x O 12 system can be found in [15][16][17][18][19]. The resultant out comes that help to explain compositional dependence of infrared spectra evolution before and after SHI irradiation are: (a) The un-substituted yttrium iron garnet, Y 3 Fe 5 O 12 (x = 0.0), and 4 atomic percentage Y 3+ -excess YIG, Y 3.2 Fe 4.8 O 12 , (x = 0.2), show single phase bcc garnet structure with space group, O h 10 Ia3d, the compositions with x = 0.4 and 0.6, possess mixed phase characteristics of YIG phase and yttrium orthoferrite, YFeO 3 phase (space group: P nma ) while x > 0.6 compositions are dominated by YFeO 3 phase.…”

Pre and Post Effect of Swift Heavy Ion Irradiation on Infrared Spectral Evolution of Y₃₊<i>_x</i>Fe_5-<i>_x</i>O₁₂ (<i>x</i> = 0.0 - 1.0) System

“…The mixed powder was then pressed in a cylindrical dye to obtain clear disc. 12 system can be found in [15][16][17][18][19]. The resultant out comes that help to explain compositional dependence of infrared spectra evolution before and after SHI irradiation are: (a) The un-substituted yttrium iron garnet, Infrared spectroscopy is one of the most powerful analytical techniques, which offers the possibility of chemical identification, vibration modes present for organic and inorganic substances.…”

50 MeV, Lisup3+sup ion induced modifications in Mssbauer signature and hyperfine interaction parameters of Ysub3+xsubFesub5-xsubOsub12sub system

“…x Fe +x O 12 garnet system have been studied earlier [7][8][9][10][11][12]. Relatively little is known regarding the effect of large (0.89 Å), nonmagnetic (0  B ) Y 3+ ions substitution for smaller (0.64 Å), highly magnetic (5  B ) Fe 3+ ions and SHI irradiation on hyperfine parameters and microscopic magnetic phase evolution of yttrium iron garnet (Y 3 Fe 5 O 12 ) system by means of Mossbauer spectral analysis.…”