Ion-beam modification of Gd{sub 2}Ti{sub 2}O{sub 7}
Conference
·
OSTI ID:10188142
Irradiation of Gd{sub 2}Ti{sub 2}O{sub 7} with 3 MeV Ar{sup +} ions results in expansion of the unit-cell volume from defect accumulation as well as irradiation-induced amorphization. The damage cross-section for amorphization determined from X-ray diffraction analysis is 0.023 nm{sup 2}. Transmission electron microscopy and electron diffraction have confirmed the irradiation-induced amorphous character at high fluences. Raman spectroscopy indicates a decrease in scattered intensity and an increase in linewidth with fluence for the principal vibrational modes, consistent with increasing irradiation-induced disorder. The wavenumber of the most intense Raman peak at {approximately} 310 cm{sup {minus}1} (attributed to the O-Gd-O bending mode) decreases with fluence, indicating a change in bond Angle. The increase in the wavenumber of the Raman peak at {approximately} 515 cm{sup {minus}1} (attributed to the Gd-O stretching mode) with fluence suggests a decrease in bone length. At intermediate fluences, a forbidden peak at 765 cm{sup {minus}1}1 becomes slightly activated by irradiation-induced disorder on the cation sites.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10188142
- Report Number(s):
- PNL-SA--20885; CONF-9209200--6; ON: DE93001514
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ion-beam modification of Gd[sub 2]Ti[sub 2]O[sub 7]
Amorphization in Gd2Ti2O7 and CaZrTi2O7 irradiated with 3 MeV argon ions
Raman scattering and photoluminescence studies of Er-implanted and Er+O coimplanted GaN
Conference
·
Tue Sep 01 00:00:00 EDT 1992
·
OSTI ID:6917067
Amorphization in Gd2Ti2O7 and CaZrTi2O7 irradiated with 3 MeV argon ions
Conference
·
Mon Jun 24 00:00:00 EDT 1991
· Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms
·
OSTI ID:5748395
Raman scattering and photoluminescence studies of Er-implanted and Er+O coimplanted GaN
Journal Article
·
Sun Oct 31 23:00:00 EST 2004
· Journal of Applied Physics
·
OSTI ID:20662141