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Title: New pressure induced phase transitions in mullite-type Bi2(Fe4-xMnx)O10-δ complex oxides

Single phased mullite-type Bi2Fe4-xMnxO10-δ mixed crystals (0.25 ± x ± 3.125) and the end-member Bi2Fe4O9, synthesized from the oxides by reaction sintering up to 825°C, were studied at high-pressures in order to probe their high-pressure behavior and any possible structural phase transitions. In-situ synchrotron radiation-based powder X-ray diffraction was carried out in a diamond anvil cell, under quasi-hydrostatic conditions, up to a pressure of about 20 GPa at room temperature for each sample. A pressure-induced phase transition was found in all samples. The transition appeared spread over a pressure range and was not completed at the top investigated pressure. This is the first report of a pressure-induced phase transition in Bi2Fe4-xMnxO10-δ mixed crystals.
Authors:
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  1. UNLV
  2. (
Publication Date:
OSTI Identifier:
1039458
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Materials Research; Journal Volume: 103; Journal Issue: 2012
Research Org:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Org:
DOE - NUCLEAR ENERGY
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE