Eur. Phys. J. E (2003) 12: 39-42
https://doi.org/10.1140/epjed/e2003-01-010-8

Inversion and suppression of an oxygen bulk phase transition in confined geometry

¹ Universität des Saarlandes, Technische Physik, 66123 Saarbrücken, Germany
² Institut Laue-Langevin, BP 156, 38042 Grenoble, Cedex 9, France

^* e-mail: enderle@ill.fr

Received: 1 January 2003
Published online: 5 November 2003

Abstract

By means of susceptibility experiments on oxygen confined to the pores of a Gelsil substrate we investigated the bulk γ-β transition. At low fillings, the transformation is completely suppressed. At higher but still incomplete filling we observe a partial transformation from γ to β on cooling and a subsequent inverted transition on heating, i.e. the transformation of γ-phase material into the β-phase upon heating. At 100% filling this inversion disappears. We discuss our results on the basis of geometric considerations.