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

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 journal › Conference article › peer-review

2 Scopus citations

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 language	English (US)
Pages (from-to)	159-164
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	504
State	Published - Jan 1 1999

All Science Journal Classification (ASJC) codes

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

Cite this

@article{12106c87ee8b4431a0824c1c419cd7b3,

title = "Radiation damage effects in ferroelectric LiTaO3 single crystals",

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.",

author = "Wetteland, {C. J.} and Sickafus, {K. E.} and Venkatraman Gopalan and Mitchell, {J. N.} and T. Hartmann and M. Nastasi and Maggiore, {C. J.} and Tesmer, {J. R.} and Mitchell, {T. E.}",

year = "1999",

month = jan,

day = "1",

language = "English (US)",

volume = "504",

pages = "159--164",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

}

TY - JOUR

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.

PY - 1999/1/1

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.

UR - http://www.scopus.com/inward/record.url?scp=0032625499&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032625499&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0032625499

SN - 0272-9172

VL - 504

SP - 159

EP - 164

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

ER -

Radiation damage effects in ferroelectric LiTaO₃ single crystals

Abstract

All Science Journal Classification (ASJC) codes

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