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Title: Local structural distortion and electrical transport properties of Bi(Ni1/2Ti1/2)O3 perovskite under high pressure

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep18229· OSTI ID:1259300
 [1];  [2];  [3];  [3];  [2];  [4];  [5];  [6]
  1. Univ. of Nevada, Las Vegas, NV (United States)
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Carnegie Institution of Washington, Argonne, IL (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Stony Brook Univ., Stony Brook, NY (United States)
  5. Institute of Physics, CAS, Beijing (China)
  6. Univ. of Nevada, Las Vegas, NV (United States); Institute of Physics, CAS, Beijing (China)
+ Show Author Affiliations

In this study, perovskite-structure materials generally exhibit local structural distortions that are distinct from long-range average crystal structure. The characterization of such distortion is critical to understanding the structura and physical properties of materials. In this work, we combined Pair Distribution Function (PDF) techniqu with Raman spectroscopy and electrical resistivity measurement to study Bi(Ni1/2Ti1/2)O3 perovskit under high pressure. PDF analysis reveals strong local structural distortion at ambient conditions As pressure increases, the local structure distortions are substantially suppressed and eventually vanis around 4 GPa, leading to concurrent changes in the electronic band structure and anomalies in the electrica resistivity. Consistent with PDF analysis, Raman spectroscopy data suggest that the local structure change to a higher ordered state at pressures above 4 GPa.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001982; EAR 11-57758; FG02-99ER45775
OSTI ID:
1259300
Alternate ID(s):
OSTI ID: 1332362
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (20)

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
phase transitions and critical phenomena
structural materials
phase transition and critical phenomena