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September 5, 2026Journal of materials research/Pratt's guide to venture capital sourcesOpen Access

Thickness-dependent crack suppression and wrinkle formation in freestanding BaTiO3 membranes

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Authors

RMRajesh MandalAKAjay KumarNPNini Pryds

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Overview

Experimental study demonstrates thickness-dependent trade-offs between cracking and wrinkling in freestanding BaTiO3 membranes, highlighting pathways for robust ferroelectric device integration.

Key Points

  • To examine how oxide thickness and polymer support thickness influence fracture mitigation, morphological stability, and ferroelectric response in released freestanding BaTiO3 membranes.
  • Released BaTiO3 membranes ranging from 5 nm to 15 nm in thickness using variable-thickness polymer support layers.
  • Characterized large-area crack propagation and nanoscale wrinkling across released oxide surfaces.
  • Tracked time-dependent written contrast and polarization switching using piezoresponse force microscopy.
  • Decreasing BaTiO3 thickness from 15 nm to 5 nm suppressed large-area visible cracking across analyzed regions but promoted dense nanoscale wrinkling.
  • Applying an intermediate polymer support thickness to 10-nm BaTiO3 membranes effectively minimized wrinkle density.
  • Piezoresponse force microscopy revealed time-dependent post-release contrast evolution driven by polarization switching, interfacial contact, strain relaxation, and charge screening.

Cite This Study

Mandal et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd3a66b95aff0620eac4chttps://doi.org/10.1557/s43578-026-01965-9
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