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Discovery of Nanoscale Electric Field‐Induced Phase Transitions in ZrO 2

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3];  [1];  [1];  [4];  [3];  [1];  [1]
  1. NaMLab gGmbH Technische Universität Dresden Noethnitzer Str. 64a 01187 Dresden Germany
  2. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA
  3. Department of Applied Sciences and Mechatronics Munich University of Applied Sciences Lothstr. 34 80335 Munich Germany
  4. Department of Physics and Astronomy University of Nebraska‐Lincoln Lincoln lincoln NE 68588 USA
Abstract

The emergence of ferroelectric and antiferroelectric properties in the semiconductor industry's most prominent high‐k dielectrics, HfO 2 and ZrO 2 , is leading to technology developments unanticipated a decade ago. Yet the failure to clearly distinguish ferroelectric from antiferroelectric behavior is impeding progress. Band‐excitation piezoresponse force microscopy and molecular dynamics are used to elucidate the nanoscale electric field‐induced phase transitions present in ZrO 2 ‐based antiferroelectrics. Antiferroelectric ZrO 2 is clearly distinguished from a closely resembling pinched La‐doped HfO 2 ferroelectric. Crystalline grains in the range of 3 – 20 nm are imaged independently undergoing reversible electric field induced phase transitions. The electrically accessible nanoscale phase transitions discovered in this study open up an unprecedented paradigm for the development of new nanoelectronic devices.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
German Research Foundation (DFG); Saxon State Parliament; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1984321
Alternate ID(s):
OSTI ID: 1984323
OSTI ID: 1985380
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 41 Vol. 33; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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