Radiation damage effects in ferroelectric LiTaO3 single crystals

C. J. Wetteland, K. E. Sickafus, Venkatraman Gopalan, J. N. Mitchell, T. Hartmann, M. Nastasi, C. J. Maggiore, J. R. Tesmer, T. E. Mitchell

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Z-cut lithium tantalate (LiTaO3) ferroelectric single crystals were irradiated with 200 keV Ar++ ions. LiTaO3 possesses a structure that is a derivative of the corundum (Al2O3) crystal structure. A systematic study of the radiation damage accumulation rate as a function of ion dose was performed using ion-beam channeling experiments. An ion fluence of 2.5·1018 Ar2+ ions/m2 was sufficient to amorphize the irradiated volume of a LiTaO3 crystal at an irradiation temperature of approximately 120K. This represents a rather exceptional susceptibility to ion-induced amorphization, which may be related to a highly disparate rate of knock-on of constituent lattice ions, due to the large mass difference between the Li and Ta cations. We also observed that the c- end of the ferroelectric polarization exhibits slightly higher ion dechanneling along with an apparent greater susceptibility to radiation damage, as compared to the c+ end of the polarization.

Original languageEnglish (US)
Pages (from-to)159-164
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume504
StatePublished - Jan 1 1999

Fingerprint

Radiation damage
radiation damage
Ferroelectric materials
Single crystals
Ions
single crystals
ions
Polarization
magnetic permeability
Corundum
Aluminum Oxide
Amorphization
polarization
lithium tantalate oxide
Lithium
Ion beams
Cations
fluence
aluminum oxides
lithium

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Wetteland, C. J., Sickafus, K. E., Gopalan, V., Mitchell, J. N., Hartmann, T., Nastasi, M., ... Mitchell, T. E. (1999). Radiation damage effects in ferroelectric LiTaO3 single crystals. Materials Research Society Symposium - Proceedings, 504, 159-164.
Wetteland, C. J. ; Sickafus, K. E. ; Gopalan, Venkatraman ; Mitchell, J. N. ; Hartmann, T. ; Nastasi, M. ; Maggiore, C. J. ; Tesmer, J. R. ; Mitchell, T. E. / Radiation damage effects in ferroelectric LiTaO3 single crystals. In: Materials Research Society Symposium - Proceedings. 1999 ; Vol. 504. pp. 159-164.
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Wetteland, CJ, Sickafus, KE, Gopalan, V, Mitchell, JN, Hartmann, T, Nastasi, M, Maggiore, CJ, Tesmer, JR & Mitchell, TE 1999, 'Radiation damage effects in ferroelectric LiTaO3 single crystals', Materials Research Society Symposium - Proceedings, vol. 504, pp. 159-164.

Radiation damage effects in ferroelectric LiTaO3 single crystals. / Wetteland, C. J.; Sickafus, K. E.; Gopalan, Venkatraman; Mitchell, J. N.; Hartmann, T.; Nastasi, M.; Maggiore, C. J.; Tesmer, J. R.; Mitchell, T. E.

In: Materials Research Society Symposium - Proceedings, Vol. 504, 01.01.1999, p. 159-164.

Research output: Contribution to journalConference article

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T1 - Radiation damage effects in ferroelectric LiTaO3 single crystals

AU - Wetteland, C. J.

AU - Sickafus, K. E.

AU - Gopalan, Venkatraman

AU - Mitchell, J. N.

AU - Hartmann, T.

AU - Nastasi, M.

AU - Maggiore, C. J.

AU - Tesmer, J. R.

AU - Mitchell, T. E.

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Y1 - 1999/1/1

N2 - Z-cut lithium tantalate (LiTaO3) ferroelectric single crystals were irradiated with 200 keV Ar++ ions. LiTaO3 possesses a structure that is a derivative of the corundum (Al2O3) crystal structure. A systematic study of the radiation damage accumulation rate as a function of ion dose was performed using ion-beam channeling experiments. An ion fluence of 2.5·1018 Ar2+ ions/m2 was sufficient to amorphize the irradiated volume of a LiTaO3 crystal at an irradiation temperature of approximately 120K. This represents a rather exceptional susceptibility to ion-induced amorphization, which may be related to a highly disparate rate of knock-on of constituent lattice ions, due to the large mass difference between the Li and Ta cations. We also observed that the c- end of the ferroelectric polarization exhibits slightly higher ion dechanneling along with an apparent greater susceptibility to radiation damage, as compared to the c+ end of the polarization.

AB - Z-cut lithium tantalate (LiTaO3) ferroelectric single crystals were irradiated with 200 keV Ar++ ions. LiTaO3 possesses a structure that is a derivative of the corundum (Al2O3) crystal structure. A systematic study of the radiation damage accumulation rate as a function of ion dose was performed using ion-beam channeling experiments. An ion fluence of 2.5·1018 Ar2+ ions/m2 was sufficient to amorphize the irradiated volume of a LiTaO3 crystal at an irradiation temperature of approximately 120K. This represents a rather exceptional susceptibility to ion-induced amorphization, which may be related to a highly disparate rate of knock-on of constituent lattice ions, due to the large mass difference between the Li and Ta cations. We also observed that the c- end of the ferroelectric polarization exhibits slightly higher ion dechanneling along with an apparent greater susceptibility to radiation damage, as compared to the c+ end of the polarization.

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Wetteland CJ, Sickafus KE, Gopalan V, Mitchell JN, Hartmann T, Nastasi M et al. Radiation damage effects in ferroelectric LiTaO3 single crystals. Materials Research Society Symposium - Proceedings. 1999 Jan 1;504:159-164.