Article
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Search for Novel Phases in Y-Ba-Cu-O Family
Version 1
: Received: 15 December 2023 / Approved: 15 December 2023 / Online: 19 December 2023 (04:46:17 CET)
A peer-reviewed article of this Preprint also exists.
Djurek, D. Search for Novel Phases in Y-Ba-Cu-O Family. Condensed Matter 2024, 9, 10, doi:10.3390/condmat9010010. Djurek, D. Search for Novel Phases in Y-Ba-Cu-O Family. Condensed Matter 2024, 9, 10, doi:10.3390/condmat9010010.
Abstract
In order to search possible residual minor phases in Y-Ba-Cu-O family, powdered mixtures of Y2O3 + BaCO3 + CuO and, independently, superconducting compound YBa2Cu3O7-x have been treated in evacuated cells and elevated temperatures.YBa2Cu3O7-x was reduced to YBa2Cu3O5 by use of the special home designed Taconis-Knudsen vacuum device. A subsequent doping by oxygen converts produced insulator YBa2Cu3O5 to semiconductor or metal YBa2Cu3O5+x (0<x<0.3). In addition to YBa2Cu3O5, 0.05 volume percent of the minor delafossite phase Y2Cu2O4 was being spotted in the powder mixture 1/2 Y2O3 + 2BaCO3+6Cu2O, heated up to 818 °C in an inert gas atmosphere. An attempt to prepare the insulating bulk delafossite samples was successful, and subsequent doping by oxygen produces novel metallic phases.
Keywords
thermo-acoustic resonator; delafossites; spin-charge separation; spinons; holons
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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