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http://hdl.handle.net/10397/4723
| Title: | Ni–Al diffusion barrier layer for integrating ferroelectric capacitors on Si | Authors: | Liu, BT Cheng, CS Li, F Ma, L Zhao, QX Yan, Z Wu, DQ Li, CR Wang, Y Li, XH Zhang, XY |
Issue Date: | 19-Jun-2006 | Source: | Applied physics letters, 19 June 2006, v. 88, no. 25, 252903, p. 1-3 | Abstract: | We report on the use of amorphous Ni–Al film (a-Ni–Al) as conductive diffusion barrier layer to integrate La₀.₅Sr₀.₅CoO₃/PbZr₀.₄Ti₀.₆O₃/La₀.₅Sr₀.₅CoO₃capacitors on silicon. Cross-sectional observation by transmission electron microscope reveals clean and sharp interfaces without any discernible interdiffusion/reaction in the sample. The physical properties of the capacitors are vertically characterized as the parameters of memory elements. Excellent ferroelectric properties, e.g., large remnant polarization of ∼ 22 μC/cm², small coercive voltage of ∼ 1.15 V, being fatigue-free, good retention characteristic, imply that amorphous Ni–Al is an ideal candidate for diffusion barrier for the high-density ferroelectric random access memories integrated with silicon transistor technology. | Keywords: | Nickel alloys Aluminium alloys Lead compounds Lanthanum compounds Strontium compounds Chemical interdiffusion Ferroelectric capacitors Metallic thin films Random-access storage Ferroelectric storage Amorphous state |
Publisher: | American Institute of Physics | Journal: | Applied physics letters | ISSN: | 0003-6951 | EISSN: | 1077-3118 | DOI: | 10.1063/1.2214142 | Rights: | © 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in B. T. Liu et al., Appl. Phys. Lett. 88, 252903 (2006) and may be found at http://link.aip.org/link/?apl/88/252903 |
| Appears in Collections: | Journal/Magazine Article |
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