Radiation damage effects in ferroelectric LiTaO

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Z-cut lithium tantalate (LiTaO{sub 3}) ferroelectric single crystals were irradiated with 200 keV Ar{sup ++} ions. LiTaO{sub 3} possesses a structure that is a derivative of the corundum (Al{sub 2}O{sub 3}) 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 x 10{sup 18} Ar{sup 2+} ions/m{sup 2} was sufficient to amorphize the irradiated volume of a LiTaO{sub 3} crystal at an irradiation temperature of approximately 120K. This represents a rather exceptional susceptibility to ion-induced amorphization, which may be related to a ... continued below

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Wetteland, C.J.; Sickafus, K.E.; Gopalan, V.; Mitchell, J.N.; Hartmann, T.; Nastasi, M. et al. August 4, 1999.

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  • Los Alamos National Laboratory
    Publisher Info: Los Alamos National Lab., Los Alamos, NM (United States)
    Place of Publication: Los Alamos, New Mexico

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Z-cut lithium tantalate (LiTaO{sub 3}) ferroelectric single crystals were irradiated with 200 keV Ar{sup ++} ions. LiTaO{sub 3} possesses a structure that is a derivative of the corundum (Al{sub 2}O{sub 3}) 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 x 10{sup 18} Ar{sup 2+} ions/m{sup 2} was sufficient to amorphize the irradiated volume of a LiTaO{sub 3} 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. The authors also observed that the c{sup {minus}} end of the ferroelectric polarization exhibits slightly higher ion dechanneling along with an apparent greater susceptibility to radiation damage, as compared to the c{sup +} end of the polarization.

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Medium: P; Size: vp.

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INIS; OSTI as DE00756994

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  • Materials Research Society Symposium, No location supplied, No date supplied

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  • Report No.: LA-UR-99-1140
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 756994
  • Archival Resource Key: ark:/67531/metadc703470

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  • August 4, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • March 10, 2016, 3:33 p.m.

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Wetteland, C.J.; Sickafus, K.E.; Gopalan, V.; Mitchell, J.N.; Hartmann, T.; Nastasi, M. et al. Radiation damage effects in ferroelectric LiTaO, article, August 4, 1999; Los Alamos, New Mexico. (digital.library.unt.edu/ark:/67531/metadc703470/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.