Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions

Singh AV, Althammer M, Rott K, Reiss G, Gupta A (2015)
Applied Physics Letters 107(12): 122903.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
We investigate the switching characteristics in BaTiO3-based ferroelectric tunnel junctions patterned in a capacitive geometry with circular Ru top electrode with diameters ranging from similar to 430 to 2300 nm. Two different patterning schemes, viz., lift-off and ion-milling, have been employed to examine the variations in the ferroelectric polarization, switching, and tunnel electro-resistance resulting from differences in the pattering processes. The values of polarization switching field are measured and compared for junctions of different diameter in the samples fabricated using both patterning schemes. We do not find any specific dependence of polarization switching bias on the size of junctions in both sample stacks. The junctions in the ion-milled sample show up to three orders of resistance change by polarization switching and the polarization retention is found to improve with increasing junction diameter. However, similar switching is absent in the lift-off sample, highlighting the effect of patterning scheme on the polarization retention. (C) 2015 AIP Publishing LLC.
Erscheinungsjahr
Zeitschriftentitel
Applied Physics Letters
Band
107
Zeitschriftennummer
12
Artikelnummer
122903
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Singh AV, Althammer M, Rott K, Reiss G, Gupta A. Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions. Applied Physics Letters. 2015;107(12): 122903.
Singh, A. V., Althammer, M., Rott, K., Reiss, G., & Gupta, A. (2015). Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions. Applied Physics Letters, 107(12), 122903. doi:10.1063/1.4931693
Singh, A. V., Althammer, M., Rott, K., Reiss, G., and Gupta, A. (2015). Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions. Applied Physics Letters 107:122903.
Singh, A.V., et al., 2015. Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions. Applied Physics Letters, 107(12): 122903.
A.V. Singh, et al., “Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions”, Applied Physics Letters, vol. 107, 2015, : 122903.
Singh, A.V., Althammer, M., Rott, K., Reiss, G., Gupta, A.: Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions. Applied Physics Letters. 107, : 122903 (2015).
Singh, A. V., Althammer, M., Rott, Karsten, Reiss, Günter, and Gupta, A. “Junction size dependence of ferroelectric properties in e-beam patterned BaTiO3 ferroelectric tunnel junctions”. Applied Physics Letters 107.12 (2015): 122903.