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Published on: June 9, 2023
Inversion and suppression of an oxygen bulk phase transition in confined geometry
1Universität des Saarlandes, Technische Physik, 66123 Saarbrücken, Germany.
Abstract:
By means of susceptibility experiments on oxygen confined to the pores of a Gelsil substrate we investigated the bulk gamma- beta transition. At low fillings, the transformation is completely suppressed. At higher but still incomplete filling we observe a partial transformation from gamma to beta on cooling and a subsequent inverted transition on heating, i.e. the transformation of gamma-phase material into the beta-phase upon heating. At 100% filling this inversion disappears. We discuss our results on the basis of geometric considerations.
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