Phase-Exchange-Driven Wake-Up and Fatigue in Ferroelectric Hafnium Zirconium Oxide Films

Fields, Shelby S.; Smith, Sean W.; Ryan, Philip J.; Jaszewski, Samantha T.; Brummel, Ian A.; Salanova, Alejandro; Esteves, Giovanni; Wolfley, Steve L.; Henry, Michael D.; Davids, Paul S.; Ihlefeld, Jon F.

doi:10.1021/acsami.0c03570

Phase-Exchange-Driven Wake-Up and Fatigue in Ferroelectric Hafnium Zirconium Oxide Films

Journal Article · Fri May 15 00:00:00 EDT 2020 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.0c03570· OSTI ID:1639052

Fields, Shelby S. ^[1]; Smith, Sean W. ^[2]; Ryan, Philip J. ^[3]; Jaszewski, Samantha T. ^[1]; Brummel, Ian A. ^[1]; Salanova, Alejandro ^[1]; Esteves, Giovanni ^[2]; Wolfley, Steve L. ^[2]; Henry, Michael D. ^[2]; Davids, Paul S. ^[2]; ^[1]

Univ. of Virginia, Charlottesville, VA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)

Ferroelectric hafnium zirconium oxide holds great promise for a broad spectrum of complementary metal–oxide–semiconductor (CMOS) compatible and scaled microelectronic applications, including memory, low-voltage transistors, and infrared sensors, among others. An outstanding challenge hindering the implementation of this material is polarization instability during field cycling. Herein, the nanoscale phenomena contributing to both polarization fatigue and wake-up are reported. Using synchrotron X-ray diffraction, the conversion of non-polar tetragonal and polar orthorhombic phases to a non-polar monoclinic phase while field cycling devices comprising noble metal contacts is observed. This phase exchange accompanies a diminishing ferroelectric remanent polarization and provides device-scale crystallographic evidence of phase exchange leading to ferroelectric fatigue in these structures. A reduction in the full width at half-maximum of the superimposed tetragonal (101) and orthorhombic (111) diffraction reflections is observed to accompany wake-up in structures comprising tantalum nitride and tungsten electrodes. Combined with polarization and relative permittivity measurements, the observed peak narrowing and a shift in position to lower angles is attributed, in part, to a phase exchange of the non-polar tetragonal to the polar orthorhombic phase during wake-up. These results provide insight into the role of electrodes in the performance of hafnium oxide-based ferroelectrics and mechanisms driving wake-up and fatigue, and demonstrate a non-destructive means to characterize the phase changes accompanying polarization instabilities.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; Semiconductor Research Corporation (SRC)

Grant/Contract Number:: AC04-94AL85000; NA0003525; AC02-06CH11357

OSTI ID:: 1639052

Alternate ID(s):: OSTI ID: 1798708

Report Number(s):: SAND--2020-6195J; 686741

Journal Information:: ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 23 Vol. 12; ISSN 1944-8244; ISSN 1944-8252

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Phase-Exchange-Driven Wake-Up and Fatigue in Ferroelectric Hafnium Zirconium Oxide Films

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